390864425 has 54 divisors (see below), whose sum is σ = 601356042. Its totient is φ = 250414080.

The previous prime is 390864421. The next prime is 390864431. The reversal of 390864425 is 524468093.

390864425 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 9 ways, for example, as 33918976 + 356945449 = 5824^2 + 18893^2 .

It is not a de Polignac number, because 390864425 - 2² = 390864421 is a prime.

It is not an unprimeable number, because it can be changed into a prime (390864421) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 2852957 + ... + 2853093.

It is an arithmetic number, because the mean of its divisors is an integer number (11136223).

Almost surely, 2^390864425 is an apocalyptic number.

390864425 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

390864425 is a deficient number, since it is larger than the sum of its proper divisors (210491617).

390864425 is a wasteful number, since it uses less digits than its factorization.

390864425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 41.

The square root of 390864425 is about 19770.2914748367. The cubic root of 390864425 is about 731.1537550785.

The spelling of 390864425 in words is "three hundred ninety million, eight hundred sixty-four thousand, four hundred twenty-five".