77861836 has 24 divisors (see below), whose sum is σ = 155373120. Its totient is φ = 33821952.

The previous prime is 77861783. The next prime is 77861837. The reversal of 77861836 is 63816877.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (77861837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43156 + ... + 44923.

It is an arithmetic number, because the mean of its divisors is an integer number (6473880).

Almost surely, 2^77861836 is an apocalyptic number.

It is an amenable number.

77861836 is a deficient number, since it is larger than the sum of its proper divisors (77511284).

77861836 is a wasteful number, since it uses less digits than its factorization.

77861836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88113 (or 88111 counting only the distinct ones).

The product of its digits is 338688, while the sum is 46.

The square root of 77861836 is about 8823.9354032087. The cubic root of 77861836 is about 427.0134423095.

The spelling of 77861836 in words is "seventy-seven million, eight hundred sixty-one thousand, eight hundred thirty-six".