80778460 has 72 divisors (see below), whose sum is σ = 199085040. Its totient is φ = 27449856.

The previous prime is 80778449. The next prime is 80778479. The reversal of 80778460 is 6487708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135924 + ... + 136516.

It is an arithmetic number, because the mean of its divisors is an integer number (2765070).

Almost surely, 2^80778460 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 80778460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99542520).

80778460 is an abundant number, since it is smaller than the sum of its proper divisors (118306580).

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

80778460 is a wasteful number, since it uses less digits than its factorization.

80778460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755 (or 746 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 80778460 is about 8987.6837950609. The cubic root of 80778460 is about 432.2800467566.

The spelling of 80778460 in words is "eighty million, seven hundred seventy-eight thousand, four hundred sixty".