78125836 has 12 divisors (see below), whose sum is σ = 137998728. Its totient is φ = 38697632.

The previous prime is 78125807. The next prime is 78125843. The reversal of 78125836 is 63852187.

It is a super-2 number, since 2×78125836² = 12207292501397792, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

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, 90841 + ... + 91696.

It is an arithmetic number, because the mean of its divisors is an integer number (11499894).

Almost surely, 2^78125836 is an apocalyptic number.

It is an amenable number.

78125836 is a deficient number, since it is larger than the sum of its proper divisors (59872892).

78125836 is a wasteful number, since it uses less digits than its factorization.

78125836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182648 (or 182646 counting only the distinct ones).

The product of its digits is 80640, while the sum is 40.

The square root of 78125836 is about 8838.8820560069. The cubic root of 78125836 is about 427.4955115063.

It can be divided in two parts, 78125 and 836, that added together give a square (78961 = 281²).

The spelling of 78125836 in words is "seventy-eight million, one hundred twenty-five thousand, eight hundred thirty-six".