1397578704 has 80 divisors (see below), whose sum is σ = 3946176000. Its totient is φ = 424304640.

The previous prime is 1397578703. The next prime is 1397578709. The reversal of 1397578704 is 4078757931.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397578703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2329 + ... + 52920.

It is an arithmetic number, because the mean of its divisors is an integer number (49327200).

Almost surely, 2^1397578704 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1397578704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1973088000).

1397578704 is an abundant number, since it is smaller than the sum of its proper divisors (2548597296).

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

1397578704 is a wasteful number, since it uses less digits than its factorization.

1397578704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55308 (or 55302 counting only the distinct ones).

The product of its (nonzero) digits is 1481760, while the sum is 51.

The square root of 1397578704 is about 37384.2039369571. The cubic root of 1397578704 is about 1118.0436468165.

The spelling of 1397578704 in words is "one billion, three hundred ninety-seven million, five hundred seventy-eight thousand, seven hundred four".