80813400 has 72 divisors (see below), whose sum is σ = 251206020. Its totient is φ = 21491520.

The previous prime is 80813387. The next prime is 80813429. The reversal of 80813400 is 431808.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 220017 + ... + 220383.

Almost surely, 2^80813400 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 80813400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125603010).

80813400 is an abundant number, since it is smaller than the sum of its proper divisors (170392620).

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

80813400 is a wasteful number, since it uses less digits than its factorization.

80813400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 80813400 is about 8989.6273560143. The cubic root of 80813400 is about 432.3423640611.

Multiplying 80813400 by its sum of digits (24), we get a square (1939521600 = 44040²).

80813400 divided by its sum of digits (24) gives a square (3367225 = 1835²).

The spelling of 80813400 in words is "eighty million, eight hundred thirteen thousand, four hundred".