390887280465 has 16 divisors (see below), whose sum is σ = 682275980736. Its totient is φ = 189521105600.

The previous prime is 390887280419. The next prime is 390887280499. The reversal of 390887280465 is 564082788093.

It is not a de Polignac number, because 390887280465 - 2³⁰ = 389813538641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 390887280399 and 390887280408.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1184506746 + ... + 1184507075.

It is an arithmetic number, because the mean of its divisors is an integer number (42642248796).

Almost surely, 2^390887280465 is an apocalyptic number.

It is an amenable number.

390887280465 is a deficient number, since it is larger than the sum of its proper divisors (291388700271).

390887280465 is a wasteful number, since it uses less digits than its factorization.

390887280465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2369013840.

The product of its (nonzero) digits is 23224320, while the sum is 60.

The spelling of 390887280465 in words is "three hundred ninety billion, eight hundred eighty-seven million, two hundred eighty thousand, four hundred sixty-five".