78925540 has 24 divisors (see below), whose sum is σ = 166090680. Its totient is φ = 31504128.

The previous prime is 78925529. The next prime is 78925571. The reversal of 78925540 is 4552987.

It can be written as a sum of positive squares in 4 ways, for example, as 44515584 + 34409956 = 6672^2 + 5866^2 .

It is a junction number, because it is equal to n+sod(n) for n = 78925493 and 78925502.

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, 6304 + ... + 14056.

It is an arithmetic number, because the mean of its divisors is an integer number (6920445).

Almost surely, 2^78925540 is an apocalyptic number.

It is an amenable number.

78925540 is an abundant number, since it is smaller than the sum of its proper divisors (87165140).

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

78925540 is a wasteful number, since it uses less digits than its factorization.

78925540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8271 (or 8269 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 78925540 is about 8884.0047275989. The cubic root of 78925540 is about 428.9491918971.

The spelling of 78925540 in words is "seventy-eight million, nine hundred twenty-five thousand, five hundred forty".