396161138 has 8 divisors (see below), whose sum is σ = 594330588. Its totient is φ = 198050944.

The previous prime is 396161137. The next prime is 396161197. The reversal of 396161138 is 831161693.

It can be written as a sum of positive squares in 2 ways, for example, as 389154529 + 7006609 = 19727^2 + 2647^2 .

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

It is a super-2 number, since 2×396161138² = 313887294522910088, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (396161137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10670 + ... + 30102.

Almost surely, 2^396161138 is an apocalyptic number.

396161138 is a deficient number, since it is larger than the sum of its proper divisors (198169450).

396161138 is a wasteful number, since it uses less digits than its factorization.

396161138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29628.

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

The square root of 396161138 is about 19903.7970749302. The cubic root of 396161138 is about 734.4416374189.

The spelling of 396161138 in words is "three hundred ninety-six million, one hundred sixty-one thousand, one hundred thirty-eight".