77412138 has 16 divisors (see below), whose sum is σ = 154910496. Its totient is φ = 25789680.

The previous prime is 77412121. The next prime is 77412151. The reversal of 77412138 is 83121477.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 77412099 and 77412108.

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, 19620 + ... + 23232.

It is an arithmetic number, because the mean of its divisors is an integer number (9681906).

Almost surely, 2^77412138 is an apocalyptic number.

77412138 is an abundant number, since it is smaller than the sum of its proper divisors (77498358).

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

77412138 is a wasteful number, since it uses less digits than its factorization.

77412138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7189.

The product of its digits is 9408, while the sum is 33.

The square root of 77412138 is about 8798.4167894002. The cubic root of 77412138 is about 426.1897697567.

The spelling of 77412138 in words is "seventy-seven million, four hundred twelve thousand, one hundred thirty-eight".