1373647380 has 144 divisors (see below), whose sum is σ = 4569820416. Its totient is φ = 307265280.

The previous prime is 1373647337. The next prime is 1373647391. The reversal of 1373647380 is 837463731.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 133210 + ... + 143150.

It is an arithmetic number, because the mean of its divisors is an integer number (31734864).

Almost surely, 2^1373647380 is an apocalyptic number.

1373647380 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 1373647380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2284910208).

1373647380 is an abundant number, since it is smaller than the sum of its proper divisors (3196173036).

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

1373647380 is a wasteful number, since it uses less digits than its factorization.

1373647380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10014 (or 10005 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 42.

The square root of 1373647380 is about 37062.7492234454. The cubic root of 1373647380 is about 1111.6252953571.

It can be divided in two parts, 13736 and 47380, that added together give a palindrome (61116).

The spelling of 1373647380 in words is "one billion, three hundred seventy-three million, six hundred forty-seven thousand, three hundred eighty".