80890656 has 192 divisors, whose sum is σ = 274046976. Its totient is φ = 20275200.

The previous prime is 80890651. The next prime is 80890661. The reversal of 80890656 is 65609808.

It is an interprime number because it is at equal distance from previous prime (80890651) and next prime (80890661).

It is a super-2 number, since 2×80890656² = 13086596456220672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (80890651) 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, 228976 + ... + 229328.

It is an arithmetic number, because the mean of its divisors is an integer number (1427328).

Almost surely, 2^80890656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80890656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137023488).

80890656 is an abundant number, since it is smaller than the sum of its proper divisors (193156320).

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

80890656 is a wasteful number, since it uses less digits than its factorization.

80890656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 80890656 is about 8993.9232818609. The cubic root of 80890656 is about 432.4800904108.

The spelling of 80890656 in words is "eighty million, eight hundred ninety thousand, six hundred fifty-six".