78021960 has 32 divisors (see below), whose sum is σ = 234066240. Its totient is φ = 20805824.

The previous prime is 78021953. The next prime is 78021991. The reversal of 78021960 is 6912087.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

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, 324972 + ... + 325211.

It is an arithmetic number, because the mean of its divisors is an integer number (7314570).

Almost surely, 2^78021960 is an apocalyptic number.

It is an amenable number.

78021960 is an abundant number, since it is smaller than the sum of its proper divisors (156044280).

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

78021960 is a wasteful number, since it uses less digits than its factorization.

78021960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650197 (or 650193 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 78021960 is about 8833.0040190187. The cubic root of 78021960 is about 427.3059616658.

The spelling of 78021960 in words is "seventy-eight million, twenty-one thousand, nine hundred sixty".