78291984 has 40 divisors (see below), whose sum is σ = 205111872. Its totient is φ = 25728640.

The previous prime is 78291959. The next prime is 78292003. The reversal of 78291984 is 48919287.

It is a super-2 number, since 2×78291984² = 12259269517312512, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8079 + ... + 14894.

Almost surely, 2^78291984 is an apocalyptic number.

It is an amenable number.

78291984 is an abundant number, since it is smaller than the sum of its proper divisors (126819888).

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

78291984 is a wasteful number, since it uses less digits than its factorization.

78291984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23055 (or 23049 counting only the distinct ones).

The product of its digits is 290304, while the sum is 48.

The square root of 78291984 is about 8848.2757642379. The cubic root of 78291984 is about 427.7983444595.

The spelling of 78291984 in words is "seventy-eight million, two hundred ninety-one thousand, nine hundred eighty-four".