397789530 has 16 divisors (see below), whose sum is σ = 954694944. Its totient is φ = 106077200.

The previous prime is 397789507. The next prime is 397789541. The reversal of 397789530 is 35987793.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6629796 + ... + 6629855.

It is an arithmetic number, because the mean of its divisors is an integer number (59668434).

Almost surely, 2^397789530 is an apocalyptic number.

397789530 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

397789530 is an abundant number, since it is smaller than the sum of its proper divisors (556905414).

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

397789530 is a wasteful number, since it uses less digits than its factorization.

397789530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13259661.

The product of its (nonzero) digits is 1428840, while the sum is 51.

The square root of 397789530 is about 19944.6616917911. The cubic root of 397789530 is about 735.4465517240.

The spelling of 397789530 in words is "three hundred ninety-seven million, seven hundred eighty-nine thousand, five hundred thirty".