1373453280 has 288 divisors, whose sum is σ = 5033538720. Its totient is φ = 349747200.

The previous prime is 1373453269. The next prime is 1373453287. The reversal of 1373453280 is 823543731.

1373453280 is a `hidden beast` number, since 1 + 37 + 345 + 3 + 280 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1373453287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2284980 + ... + 2285580.

It is an arithmetic number, because the mean of its divisors is an integer number (17477565).

Almost surely, 2^1373453280 is an apocalyptic number.

1373453280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1373453280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2516769360).

1373453280 is an abundant number, since it is smaller than the sum of its proper divisors (3660085440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1373453280 is a wasteful number, since it uses less digits than its factorization.

1373453280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671 (or 634 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 1373453280 is about 37060.1305987985. The cubic root of 1373453280 is about 1111.5729343615.

It can be divided in two parts, 137345 and 3280, that added together give a square (140625 = 375²).

The spelling of 1373453280 in words is "one billion, three hundred seventy-three million, four hundred fifty-three thousand, two hundred eighty".