1393217280 has 576 divisors, whose sum is σ = 6098641920. Its totient is φ = 293289984.

The previous prime is 1393217263. The next prime is 1393217281. The reversal of 1393217280 is 827123931.

It is a tau number, because it is divible by the number of its divisors (576).

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 (1393217281) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3144739 + ... + 3145181.

It is an arithmetic number, because the mean of its divisors is an integer number (10587920).

Almost surely, 2^1393217280 is an apocalyptic number.

1393217280 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 1393217280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3049320960).

1393217280 is an abundant number, since it is smaller than the sum of its proper divisors (4705424640).

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

1393217280 is a wasteful number, since it uses less digits than its factorization.

1393217280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493 (or 473 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 1393217280 is about 37325.8259118268. The cubic root of 1393217280 is about 1116.8794085894.

The spelling of 1393217280 in words is "one billion, three hundred ninety-three million, two hundred seventeen thousand, two hundred eighty".