390385835281 has 16 divisors (see below), whose sum is σ = 428409160704. Its totient is φ = 353506405824.

The previous prime is 390385835263. The next prime is 390385835311. The reversal of 390385835281 is 182538583093.

It is not a de Polignac number, because 390385835281 - 2¹³ = 390385827089 is a prime.

It is a super-2 number, since 2×390385835281² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390385835201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5287240 + ... + 5360566.

It is an arithmetic number, because the mean of its divisors is an integer number (26775572544).

Almost surely, 2^390385835281 is an apocalyptic number.

It is an amenable number.

390385835281 is a deficient number, since it is larger than the sum of its proper divisors (38023325423).

390385835281 is a wasteful number, since it uses less digits than its factorization.

390385835281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81120.

The product of its (nonzero) digits is 6220800, while the sum is 55.

The spelling of 390385835281 in words is "three hundred ninety billion, three hundred eighty-five million, eight hundred thirty-five thousand, two hundred eighty-one".