397744140 has 48 divisors (see below), whose sum is σ = 1114864128. Its totient is φ = 105952704.

The previous prime is 397744099. The next prime is 397744141. The reversal of 397744140 is 41447793.

It is not an unprimeable number, because it can be changed into a prime (397744141) by changing a digit.

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, 64429 + ... + 70331.

It is an arithmetic number, because the mean of its divisors is an integer number (23226336).

Almost surely, 2^397744140 is an apocalyptic number.

397744140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

397744140 is an abundant number, since it is smaller than the sum of its proper divisors (717119988).

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

397744140 is a wasteful number, since it uses less digits than its factorization.

397744140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7038 (or 7036 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 39.

The square root of 397744140 is about 19943.5237608603. The cubic root of 397744140 is about 735.4185778113.

The spelling of 397744140 in words is "three hundred ninety-seven million, seven hundred forty-four thousand, one hundred forty".