77032138 has 4 divisors (see below), whose sum is σ = 115548210. Its totient is φ = 38516068.

The previous prime is 77032121. The next prime is 77032157. The reversal of 77032138 is 83123077.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 69006249 + 8025889 = 8307^2 + 2833^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19258033 + ... + 19258036.

Almost surely, 2^77032138 is an apocalyptic number.

77032138 is a deficient number, since it is larger than the sum of its proper divisors (38516072).

77032138 is a wasteful number, since it uses less digits than its factorization.

77032138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38516071.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 77032138 is about 8776.7954288567. The cubic root of 77032138 is about 425.4912667480.

The spelling of 77032138 in words is "seventy-seven million, thirty-two thousand, one hundred thirty-eight".