77436140 has 24 divisors (see below), whose sum is σ = 167862912. Its totient is φ = 29975040.

The previous prime is 77436113. The next prime is 77436157. The reversal of 77436140 is 4163477.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 77436097 and 77436106.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61829 + ... + 63068.

It is an arithmetic number, because the mean of its divisors is an integer number (6994288).

Almost surely, 2^77436140 is an apocalyptic number.

It is an amenable number.

77436140 is an abundant number, since it is smaller than the sum of its proper divisors (90426772).

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

77436140 is a wasteful number, since it uses less digits than its factorization.

77436140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124937 (or 124935 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 77436140 is about 8799.7806790851. The cubic root of 77436140 is about 426.2338125906.

The spelling of 77436140 in words is "seventy-seven million, four hundred thirty-six thousand, one hundred forty".