78275980 has 24 divisors (see below), whose sum is σ = 165222288. Its totient is φ = 31149888.

The previous prime is 78275971. The next prime is 78275999. The reversal of 78275980 is 8957287.

It is a super-2 number, since 2×78275980² = 12254258089920800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78275980.

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, 5994 + ... + 13873.

It is an arithmetic number, because the mean of its divisors is an integer number (6884262).

Almost surely, 2^78275980 is an apocalyptic number.

It is an amenable number.

78275980 is an abundant number, since it is smaller than the sum of its proper divisors (86946308).

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

78275980 is a wasteful number, since it uses less digits than its factorization.

78275980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20073 (or 20071 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 46.

The square root of 78275980 is about 8847.3713610315. The cubic root of 78275980 is about 427.7691931087.

The spelling of 78275980 in words is "seventy-eight million, two hundred seventy-five thousand, nine hundred eighty".