397128044 has 12 divisors (see below), whose sum is σ = 731551800. Its totient is φ = 188113248.

The previous prime is 397128019. The next prime is 397128071. The reversal of 397128044 is 440821793.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 397127989 and 397128007.

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 3 ways as a sum of consecutive naturals, for example, 2612609 + ... + 2612760.

It is an arithmetic number, because the mean of its divisors is an integer number (60962650).

Almost surely, 2^397128044 is an apocalyptic number.

It is an amenable number.

397128044 is a deficient number, since it is larger than the sum of its proper divisors (334423756).

397128044 is a wasteful number, since it uses less digits than its factorization.

397128044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5225392 (or 5225390 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 397128044 is about 19928.0717582008. The cubic root of 397128044 is about 735.0386664219.

The spelling of 397128044 in words is "three hundred ninety-seven million, one hundred twenty-eight thousand, forty-four".