390834087 has 16 divisors (see below), whose sum is σ = 596984832. Its totient is φ = 222798240.

The previous prime is 390834079. The next prime is 390834109. The reversal of 390834087 is 780438093.

It is not a de Polignac number, because 390834087 - 2³ = 390834079 is a prime.

It is a super-2 number, since 2×390834087² = 305502567122247138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390834077) 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, 13263 + ... + 30944.

It is an arithmetic number, because the mean of its divisors is an integer number (37311552).

Almost surely, 2^390834087 is an apocalyptic number.

390834087 is a deficient number, since it is larger than the sum of its proper divisors (206150745).

390834087 is a wasteful number, since it uses less digits than its factorization.

390834087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44638.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 390834087 is about 19769.5241976128. The cubic root of 390834087 is about 731.1348377633.

The spelling of 390834087 in words is "three hundred ninety million, eight hundred thirty-four thousand, eighty-seven".