78920808 has 16 divisors (see below), whose sum is σ = 197302080. Its totient is φ = 26306928.

The previous prime is 78920801. The next prime is 78920837. The reversal of 78920808 is 80802987.

It is a happy number.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 78920808.

It is not an unprimeable number, because it can be changed into a prime (78920801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1644160 + ... + 1644207.

It is an arithmetic number, because the mean of its divisors is an integer number (12331380).

Almost surely, 2^78920808 is an apocalyptic number.

It is an amenable number.

78920808 is an abundant number, since it is smaller than the sum of its proper divisors (118381272).

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

78920808 is a wasteful number, since it uses less digits than its factorization.

78920808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3288376 (or 3288372 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 42.

The square root of 78920808 is about 8883.7384022719. The cubic root of 78920808 is about 428.9406191413.

Subtracting from 78920808 its sum of digits (42), we obtain a triangular number (78920766 = T₁₂₅₆₃).

The spelling of 78920808 in words is "seventy-eight million, nine hundred twenty thousand, eight hundred eight".