78550988 has 24 divisors (see below), whose sum is σ = 139499472. Its totient is φ = 38697984.

The previous prime is 78550973. The next prime is 78551009. The reversal of 78550988 is 88905587.

It is a super-2 number, since 2×78550988² = 12340515431552288, which contains 22 as substring.

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, 171656 + ... + 172112.

It is an arithmetic number, because the mean of its divisors is an integer number (5812478).

Almost surely, 2^78550988 is an apocalyptic number.

It is an amenable number.

78550988 is a deficient number, since it is larger than the sum of its proper divisors (60948484).

78550988 is a wasteful number, since it uses less digits than its factorization.

78550988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001 (or 999 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 50.

The square root of 78550988 is about 8862.8995255503. The cubic root of 78550988 is about 428.2695698947.

The spelling of 78550988 in words is "seventy-eight million, five hundred fifty thousand, nine hundred eighty-eight".