397745712 has 240 divisors, whose sum is σ = 1386577920. Its totient is φ = 103638528.

The previous prime is 397745669. The next prime is 397745713. The reversal of 397745712 is 217547793.

397745712 is a `hidden beast` number, since 3 + 9 + 7 + 74 + 571 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (397745713) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1664089 + ... + 1664327.

It is an arithmetic number, because the mean of its divisors is an integer number (5777408).

Almost surely, 2^397745712 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 397745712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (693288960).

397745712 is an abundant number, since it is smaller than the sum of its proper divisors (988832208).

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

397745712 is a wasteful number, since it uses less digits than its factorization.

397745712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400 (or 391 counting only the distinct ones).

The product of its digits is 370440, while the sum is 45.

The square root of 397745712 is about 19943.5631721114. The cubic root of 397745712 is about 735.4195466724.

The spelling of 397745712 in words is "three hundred ninety-seven million, seven hundred forty-five thousand, seven hundred twelve".