390630081 has 8 divisors (see below), whose sum is σ = 527975200. Its totient is φ = 256852512.

The previous prime is 390630077. The next prime is 390630133. The reversal of 390630081 is 180036093.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 390630081 - 2² = 390630077 is a prime.

It is a super-2 number, since 2×390630081² = 305183720364133122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390630061) 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, 891631 + ... + 892068.

It is an arithmetic number, because the mean of its divisors is an integer number (65996900).

Almost surely, 2^390630081 is an apocalyptic number.

It is an amenable number.

390630081 is a deficient number, since it is larger than the sum of its proper divisors (137345119).

390630081 is a wasteful number, since it uses less digits than its factorization.

390630081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1783775.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 390630081 is about 19764.3639158967. The cubic root of 390630081 is about 731.0076040188.

The spelling of 390630081 in words is "three hundred ninety million, six hundred thirty thousand, eighty-one".