390551072 has 12 divisors (see below), whose sum is σ = 768897486. Its totient is φ = 195275520.

The previous prime is 390551053. The next prime is 390551087. The reversal of 390551072 is 270155093.

It can be written as a sum of positive squares in only one way, i.e., 288864016 + 101687056 = 16996^2 + 10084^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 12204721 = 390551072 / (3 + 9 + 0 + 5 + 5 + 1 + 0 + 7 + 2).

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 as a sum of consecutive naturals, namely, 6102329 + ... + 6102392.

Almost surely, 2^390551072 is an apocalyptic number.

390551072 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

390551072 is a deficient number, since it is larger than the sum of its proper divisors (378346414).

390551072 is a wasteful number, since it uses less digits than its factorization.

390551072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12204731 (or 12204723 counting only the distinct ones).

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 390551072 is about 19762.3650406524. The cubic root of 390551072 is about 730.9583160633.

The spelling of 390551072 in words is "three hundred ninety million, five hundred fifty-one thousand, seventy-two".