78187036 has 12 divisors (see below), whose sum is σ = 139146840. Its totient is φ = 38430800.

The previous prime is 78187027. The next prime is 78187037. The reversal of 78187036 is 63078187.

It is a super-2 number, since 2×78187036² = 12226425196930592, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 78187036.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78187037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165415 + ... + 165886.

It is an arithmetic number, because the mean of its divisors is an integer number (11595570).

Almost surely, 2^78187036 is an apocalyptic number.

It is an amenable number.

78187036 is a deficient number, since it is larger than the sum of its proper divisors (60959804).

78187036 is a wasteful number, since it uses less digits than its factorization.

78187036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331364 (or 331362 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 78187036 is about 8842.3433545639. The cubic root of 78187036 is about 427.6071088049.

The spelling of 78187036 in words is "seventy-eight million, one hundred eighty-seven thousand, thirty-six".