78912988 has 24 divisors (see below), whose sum is σ = 172174464. Its totient is φ = 30745200.

The previous prime is 78912983. The next prime is 78912989. The reversal of 78912988 is 88921987.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78912983) 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, 127798 + ... + 128413.

It is an arithmetic number, because the mean of its divisors is an integer number (7173936).

Almost surely, 2^78912988 is an apocalyptic number.

It is an amenable number.

78912988 is an abundant number, since it is smaller than the sum of its proper divisors (93261476).

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

78912988 is a wasteful number, since it uses less digits than its factorization.

78912988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256233 (or 256231 counting only the distinct ones).

The product of its digits is 580608, while the sum is 52.

The square root of 78912988 is about 8883.2982613442. The cubic root of 78912988 is about 428.9264512409.

The spelling of 78912988 in words is "seventy-eight million, nine hundred twelve thousand, nine hundred eighty-eight".