78508090 has 16 divisors (see below), whose sum is σ = 141419520. Its totient is φ = 31379920.

The previous prime is 78508081. The next prime is 78508093. The reversal of 78508090 is 9080587.

It is not an unprimeable number, because it can be changed into a prime (78508093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19251 + ... + 22969.

It is an arithmetic number, because the mean of its divisors is an integer number (8838720).

Almost surely, 2^78508090 is an apocalyptic number.

78508090 is a deficient number, since it is larger than the sum of its proper divisors (62911430).

78508090 is a wasteful number, since it uses less digits than its factorization.

78508090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5837.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 78508090 is about 8860.4791066849. The cubic root of 78508090 is about 428.1915939885.

The spelling of 78508090 in words is "seventy-eight million, five hundred eight thousand, ninety".