1397356938 has 48 divisors (see below), whose sum is σ = 3296872800. Its totient is φ = 426051360.

The previous prime is 1397356937. The next prime is 1397356943. The reversal of 1397356938 is 8396537931.

1397356938 is a `hidden beast` number, since 1 + 3 + 9 + 73 + 569 + 3 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (1397356937) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60528 + ... + 80363.

It is an arithmetic number, because the mean of its divisors is an integer number (68684850).

Almost surely, 2^1397356938 is an apocalyptic number.

1397356938 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1397356938 is an abundant number, since it is smaller than the sum of its proper divisors (1899515862).

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

1397356938 is a wasteful number, since it uses less digits than its factorization.

1397356938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140947 (or 140944 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 54.

The square root of 1397356938 is about 37381.2377804695. The cubic root of 1397356938 is about 1117.9845071100.

The spelling of 1397356938 in words is "one billion, three hundred ninety-seven million, three hundred fifty-six thousand, nine hundred thirty-eight".