80622640 has 120 divisors (see below), whose sum is σ = 221115312. Its totient is φ = 27256320.

The previous prime is 80622637. The next prime is 80622677. The reversal of 80622640 is 4622608.

80622640 = T₁ + T₂ + ... + T₇₈₄.

80622640 is a nontrivial binomial coefficient, being equal to C(786, 3).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 80622599 and 80622608.

It is an unprimeable number.

It is the 784-th tetrahedral number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 513442 + ... + 513598.

Almost surely, 2^80622640 is an apocalyptic number.

80622640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80622640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110557656).

80622640 is an abundant number, since it is smaller than the sum of its proper divisors (140492672).

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

80622640 is a wasteful number, since it uses less digits than its factorization.

80622640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315 (or 302 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 80622640 is about 8979.0110814053. The cubic root of 80622640 is about 432.0019147149.

The spelling of 80622640 in words is "eighty million, six hundred twenty-two thousand, six hundred forty".