78578580 has 48 divisors (see below), whose sum is σ = 229590144. Its totient is φ = 20042880.

The previous prime is 78578579. The next prime is 78578581. The reversal of 78578580 is 8587587.

It is an interprime number because it is at equal distance from previous prime (78578579) and next prime (78578581).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78578581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27091 + ... + 29850.

It is an arithmetic number, because the mean of its divisors is an integer number (4783128).

Almost surely, 2^78578580 is an apocalyptic number.

It is an amenable number.

78578580 is an abundant number, since it is smaller than the sum of its proper divisors (151011564).

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

78578580 is a wasteful number, since it uses less digits than its factorization.

78578580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56976 (or 56974 counting only the distinct ones).

The product of its (nonzero) digits is 627200, while the sum is 48.

The square root of 78578580 is about 8864.4559900763. The cubic root of 78578580 is about 428.3197090080.

The spelling of 78578580 in words is "seventy-eight million, five hundred seventy-eight thousand, five hundred eighty".