80440784 has 40 divisors (see below), whose sum is σ = 162275328. Its totient is φ = 38586240.

The previous prime is 80440757. The next prime is 80440823. The reversal of 80440784 is 48704408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62354 + ... + 63630.

Almost surely, 2^80440784 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 80440784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81137664).

80440784 is an abundant number, since it is smaller than the sum of its proper divisors (81834544).

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

80440784 is a wasteful number, since it uses less digits than its factorization.

80440784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1443 (or 1437 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 35.

The square root of 80440784 is about 8968.8786367082. The cubic root of 80440784 is about 431.6768559648.

The spelling of 80440784 in words is "eighty million, four hundred forty thousand, seven hundred eighty-four".