78580690 has 16 divisors (see below), whose sum is σ = 141552000. Its totient is φ = 31408560.

The previous prime is 78580687. The next prime is 78580699. The reversal of 78580690 is 9608587.

It is a happy number.

It is a super-2 number, since 2×78580690² = 12349849681752200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78580699) 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, 18025 + ... + 21955.

It is an arithmetic number, because the mean of its divisors is an integer number (8847000).

Almost surely, 2^78580690 is an apocalyptic number.

78580690 is a deficient number, since it is larger than the sum of its proper divisors (62971310).

78580690 is a wasteful number, since it uses less digits than its factorization.

78580690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5937.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 78580690 is about 8864.5750039130. The cubic root of 78580690 is about 428.3235427351.

The spelling of 78580690 in words is "seventy-eight million, five hundred eighty thousand, six hundred ninety".