396290081 has 16 divisors (see below), whose sum is σ = 447737856. Its totient is φ = 347490000.

The previous prime is 396290071. The next prime is 396290123. The reversal of 396290081 is 180092693.

It is a de Polignac number, because none of the positive numbers 2^k-396290081 is a prime.

It is a super-2 number, since 2×396290081² = 314091656597973122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (396290071) 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, 111116 + ... + 114626.

It is an arithmetic number, because the mean of its divisors is an integer number (27983616).

Almost surely, 2^396290081 is an apocalyptic number.

396290081 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

396290081 is a deficient number, since it is larger than the sum of its proper divisors (51447775).

396290081 is a wasteful number, since it uses less digits than its factorization.

396290081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3884.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 396290081 is about 19907.0359672152. The cubic root of 396290081 is about 734.5213110890.

The spelling of 396290081 in words is "three hundred ninety-six million, two hundred ninety thousand, eighty-one".