78451960 has 32 divisors (see below), whose sum is σ = 182606400. Its totient is φ = 30298240.

The previous prime is 78451949. The next prime is 78451981. The reversal of 78451960 is 6915487.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32656 + ... + 34975.

It is an arithmetic number, because the mean of its divisors is an integer number (5706450).

Almost surely, 2^78451960 is an apocalyptic number.

It is an amenable number.

78451960 is an abundant number, since it is smaller than the sum of its proper divisors (104154440).

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

78451960 is a wasteful number, since it uses less digits than its factorization.

78451960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67671 (or 67667 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 78451960 is about 8857.3111043928. The cubic root of 78451960 is about 428.0895233004.

The spelling of 78451960 in words is "seventy-eight million, four hundred fifty-one thousand, nine hundred sixty".