78536670 has 32 divisors (see below), whose sum is σ = 191687040. Its totient is φ = 20587680.

The previous prime is 78536659. The next prime is 78536677. The reversal of 78536670 is 7663587.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78536677) 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, 20416 + ... + 23955.

It is an arithmetic number, because the mean of its divisors is an integer number (5990220).

Almost surely, 2^78536670 is an apocalyptic number.

78536670 is an abundant number, since it is smaller than the sum of its proper divisors (113150370).

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

78536670 is a wasteful number, since it uses less digits than its factorization.

78536670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44440.

The product of its (nonzero) digits is 211680, while the sum is 42.

The square root of 78536670 is about 8862.0917395387. The cubic root of 78536670 is about 428.2435471526.

The spelling of 78536670 in words is "seventy-eight million, five hundred thirty-six thousand, six hundred seventy".