397739154 has 32 divisors (see below), whose sum is σ = 818322624. Its totient is φ = 128825280.

The previous prime is 397739149. The next prime is 397739171. The reversal of 397739154 is 451937793.

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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23832 + ... + 36924.

It is an arithmetic number, because the mean of its divisors is an integer number (25572582).

Almost surely, 2^397739154 is an apocalyptic number.

397739154 is an abundant number, since it is smaller than the sum of its proper divisors (420583470).

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

397739154 is a wasteful number, since it uses less digits than its factorization.

397739154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13242.

The product of its digits is 714420, while the sum is 48.

The square root of 397739154 is about 19943.3987574836. The cubic root of 397739154 is about 735.4155048037.

The spelling of 397739154 in words is "three hundred ninety-seven million, seven hundred thirty-nine thousand, one hundred fifty-four".