396507181 has 32 divisors (see below), whose sum is σ = 491765760. Its totient is φ = 312149376.

The previous prime is 396507179. The next prime is 396507197. The reversal of 396507181 is 181705693.

It is not a de Polignac number, because 396507181 - 2¹ = 396507179 is a prime.

It is a super-2 number, since 2×396507181² = 314435889169133522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396507101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 856156 + ... + 856618.

It is an arithmetic number, because the mean of its divisors is an integer number (15367680).

Almost surely, 2^396507181 is an apocalyptic number.

It is an amenable number.

396507181 is a deficient number, since it is larger than the sum of its proper divisors (95258579).

396507181 is a wasteful number, since it uses less digits than its factorization.

396507181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 396507181 is about 19912.4880665375. The cubic root of 396507181 is about 734.6554177895.

The spelling of 396507181 in words is "three hundred ninety-six million, five hundred seven thousand, one hundred eighty-one".