78944090 has 64 divisors (see below), whose sum is σ = 158630400. Its totient is φ = 28148736.

The previous prime is 78944081. The next prime is 78944093. The reversal of 78944090 is 9044987.

78944090 = 128² + 129² + ... + 620².

It is not an unprimeable number, because it can be changed into a prime (78944093) 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, 330191 + ... + 330429.

It is an arithmetic number, because the mean of its divisors is an integer number (2478600).

Almost surely, 2^78944090 is an apocalyptic number.

78944090 is an abundant number, since it is smaller than the sum of its proper divisors (79686310).

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

78944090 is a wasteful number, since it uses less digits than its factorization.

78944090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 78944090 is about 8885.0486774131. The cubic root of 78944090 is about 428.9827948103.

The spelling of 78944090 in words is "seventy-eight million, nine hundred forty-four thousand, ninety".