1397688830 has 32 divisors (see below), whose sum is σ = 2804038560. Its totient is φ = 498493440.

The previous prime is 1397688829. The next prime is 1397688833. The reversal of 1397688830 is 388867931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397688833) 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, 213131 + ... + 219590.

It is an arithmetic number, because the mean of its divisors is an integer number (87626205).

Almost surely, 2^1397688830 is an apocalyptic number.

1397688830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1397688830 is an abundant number, since it is smaller than the sum of its proper divisors (1406349730).

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

1397688830 is a wasteful number, since it uses less digits than its factorization.

1397688830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432764.

The product of its (nonzero) digits is 1741824, while the sum is 53.

The square root of 1397688830 is about 37385.6768027543. The cubic root of 1397688830 is about 1118.0730124712.

The spelling of 1397688830 in words is "one billion, three hundred ninety-seven million, six hundred eighty-eight thousand, eight hundred thirty".