78730040 has 16 divisors (see below), whose sum is σ = 177142680. Its totient is φ = 31492000.

The previous prime is 78730039. The next prime is 78730061. The reversal of 78730040 is 4003787.

It is a junction number, because it is equal to n+sod(n) for n = 78729985 and 78730012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 984086 + ... + 984165.

Almost surely, 2^78730040 is an apocalyptic number.

It is an amenable number.

78730040 is an abundant number, since it is smaller than the sum of its proper divisors (98412640).

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

78730040 is a wasteful number, since it uses less digits than its factorization.

78730040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1968262 (or 1968258 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 78730040 is about 8872.9949847839. The cubic root of 78730040 is about 428.5947274106.

The spelling of 78730040 in words is "seventy-eight million, seven hundred thirty thousand, forty".