390740790261 has 8 divisors (see below), whose sum is σ = 521778296160. Its totient is φ = 260098572272.

The previous prime is 390740790259. The next prime is 390740790311. The reversal of 390740790261 is 162097047093.

It is a happy number.

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 390740790261 - 2¹ = 390740790259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 390740790261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390740790211) 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, 98819670 + ... + 98823623.

It is an arithmetic number, because the mean of its divisors is an integer number (65222287020).

Almost surely, 2^390740790261 is an apocalyptic number.

It is an amenable number.

390740790261 is a deficient number, since it is larger than the sum of its proper divisors (131037505899).

390740790261 is a wasteful number, since it uses less digits than its factorization.

390740790261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197643955.

The product of its (nonzero) digits is 571536, while the sum is 48.

The spelling of 390740790261 in words is "three hundred ninety billion, seven hundred forty million, seven hundred ninety thousand, two hundred sixty-one".