397616912 has 160 divisors (see below), whose sum is σ = 1028505600. Its totient is φ = 144345600.

The previous prime is 397616903. The next prime is 397616917. The reversal of 397616912 is 219616793.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (397616917) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1107389 + ... + 1107747.

It is an arithmetic number, because the mean of its divisors is an integer number (6428160).

Almost surely, 2^397616912 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 397616912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (514252800).

397616912 is an abundant number, since it is smaller than the sum of its proper divisors (630888688).

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

397616912 is a wasteful number, since it uses less digits than its factorization.

397616912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445 (or 439 counting only the distinct ones).

The product of its digits is 122472, while the sum is 44.

The square root of 397616912 is about 19940.3337986103. Note that the first 3 decimals coincide. The cubic root of 397616912 is about 735.3401556939.

The spelling of 397616912 in words is "three hundred ninety-seven million, six hundred sixteen thousand, nine hundred twelve".