163390456 has 16 divisors (see below), whose sum is σ = 308388240. Its totient is φ = 81153600.

The previous prime is 163390441. The next prime is 163390457. The reversal of 163390456 is 654093361.

It is a super-2 number, since 2×163390456² = 53392882223775872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163390457) 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, 66421 + ... + 68836.

It is an arithmetic number, because the mean of its divisors is an integer number (19274265).

Almost surely, 2^163390456 is an apocalyptic number.

It is an amenable number.

163390456 is a deficient number, since it is larger than the sum of its proper divisors (144997784).

163390456 is a wasteful number, since it uses less digits than its factorization.

163390456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135414 (or 135410 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 37.

The square root of 163390456 is about 12782.4276254552. The cubic root of 163390456 is about 546.6913826488.

The spelling of 163390456 in words is "one hundred sixty-three million, three hundred ninety thousand, four hundred fifty-six".