78570540 has 48 divisors (see below), whose sum is σ = 244443360. Its totient is φ = 20952000.

The previous prime is 78570509. The next prime is 78570551. The reversal of 78570540 is 4507587.

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 = 78570495 and 78570504.

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 15 ways as a sum of consecutive naturals, for example, 72211 + ... + 73290.

It is an arithmetic number, because the mean of its divisors is an integer number (5092570).

Almost surely, 2^78570540 is an apocalyptic number.

It is an amenable number.

78570540 is an abundant number, since it is smaller than the sum of its proper divisors (165872820).

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

78570540 is a wasteful number, since it uses less digits than its factorization.

78570540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145519 (or 145511 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The square root of 78570540 is about 8864.0024819491. The cubic root of 78570540 is about 428.3051002434.

The spelling of 78570540 in words is "seventy-eight million, five hundred seventy thousand, five hundred forty".