396161140 has 12 divisors (see below), whose sum is σ = 831938436. Its totient is φ = 158464448.

The previous prime is 396161137. The next prime is 396161197. The reversal of 396161140 is 41161693.

It can be written as a sum of positive squares in 2 ways, for example, as 93818596 + 302342544 = 9686^2 + 17388^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9904009 + ... + 9904048.

It is an arithmetic number, because the mean of its divisors is an integer number (69328203).

Almost surely, 2^396161140 is an apocalyptic number.

It is an amenable number.

396161140 is an abundant number, since it is smaller than the sum of its proper divisors (435777296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

396161140 is a wasteful number, since it uses less digits than its factorization.

396161140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19808066 (or 19808064 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 396161140 is about 19903.7971251719. The cubic root of 396161140 is about 734.4416386549.

The spelling of 396161140 in words is "three hundred ninety-six million, one hundred sixty-one thousand, one hundred forty".