390440025961 has 8 divisors (see below), whose sum is σ = 390757707144. Its totient is φ = 390122476800.

The previous prime is 390440025953. The next prime is 390440025977. The reversal of 390440025961 is 169520044093.

It can be written as a sum of positive squares in 4 ways, for example, as 6760128400 + 383679897561 = 82220^2 + 619419^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 390440025961 - 2³ = 390440025953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390440005961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6380611 + ... + 6441511.

It is an arithmetic number, because the mean of its divisors is an integer number (48844713393).

Almost surely, 2^390440025961 is an apocalyptic number.

It is an amenable number.

390440025961 is a deficient number, since it is larger than the sum of its proper divisors (317681183).

390440025961 is a wasteful number, since it uses less digits than its factorization.

390440025961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66011.

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 390440025961 in words is "three hundred ninety billion, four hundred forty million, twenty-five thousand, nine hundred sixty-one".