78604740 has 36 divisors (see below), whose sum is σ = 238434924. Its totient is φ = 20961216.

The previous prime is 78604733. The next prime is 78604781. The reversal of 78604740 is 4740687.

It is a happy number.

78604740 is a `hidden beast` number, since 7 + 8 + 604 + 7 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 26071236 + 52533504 = 5106^2 + 7248^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 78604695 and 78604704.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 218167 + ... + 218526.

Almost surely, 2^78604740 is an apocalyptic number.

It is an amenable number.

78604740 is an abundant number, since it is smaller than the sum of its proper divisors (159830184).

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

78604740 is a wasteful number, since it uses less digits than its factorization.

78604740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436708 (or 436703 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 78604740 is about 8865.9314231501. The cubic root of 78604740 is about 428.3672351081.

The spelling of 78604740 in words is "seventy-eight million, six hundred four thousand, seven hundred forty".