78988560 has 80 divisors (see below), whose sum is σ = 279851136. Its totient is φ = 18054144.

The previous prime is 78988543. The next prime is 78988561. The reversal of 78988560 is 6588987.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×78988560² = 12478385221747200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78988561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21829 + ... + 25188.

Almost surely, 2^78988560 is an apocalyptic number.

78988560 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

78988560 is an abundant number, since it is smaller than the sum of its proper divisors (200862576).

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

78988560 is a wasteful number, since it uses less digits than its factorization.

78988560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47040 (or 47034 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 51.

The square root of 78988560 is about 8887.5508437364. The cubic root of 78988560 is about 429.0633297979.

The spelling of 78988560 in words is "seventy-eight million, nine hundred eighty-eight thousand, five hundred sixty".