78779996 has 6 divisors (see below), whose sum is σ = 137865000. Its totient is φ = 39389996.

The previous prime is 78779977. The next prime is 78780001. The reversal of 78779996 is 69997787.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9847496 + ... + 9847503.

It is an arithmetic number, because the mean of its divisors is an integer number (22977500).

Almost surely, 2^78779996 is an apocalyptic number.

It is an amenable number.

78779996 is a deficient number, since it is larger than the sum of its proper divisors (59085004).

78779996 is a wasteful number, since it uses less digits than its factorization.

78779996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19695003 (or 19695001 counting only the distinct ones).

The product of its digits is 12002256, while the sum is 62.

The square root of 78779996 is about 8875.8095968762. The cubic root of 78779996 is about 428.6853592763.

The spelling of 78779996 in words is "seventy-eight million, seven hundred seventy-nine thousand, nine hundred ninety-six".