390688995 has 16 divisors (see below), whose sum is σ = 628941312. Its totient is φ = 207087840.

The previous prime is 390688981. The next prime is 390689011. The reversal of 390688995 is 599886093.

It is not a de Polignac number, because 390688995 - 2⁴ = 390688979 is a prime.

It is a super-2 number, since 2×390688995² = 305275781628220050, which contains 22 as substring.

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, 77451 + ... + 82340.

It is an arithmetic number, because the mean of its divisors is an integer number (39308832).

Almost surely, 2^390688995 is an apocalyptic number.

390688995 is a deficient number, since it is larger than the sum of its proper divisors (238252317).

390688995 is a wasteful number, since it uses less digits than its factorization.

390688995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159962.

The product of its (nonzero) digits is 4199040, while the sum is 57.

The square root of 390688995 is about 19765.8542694213. The cubic root of 390688995 is about 731.0443518434.

The spelling of 390688995 in words is "three hundred ninety million, six hundred eighty-eight thousand, nine hundred ninety-five".