77632538 has 4 divisors (see below), whose sum is σ = 116448810. Its totient is φ = 38816268.

The previous prime is 77632519. The next prime is 77632547. The reversal of 77632538 is 83523677.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83523677 = 19 ⋅4395983.

It can be written as a sum of positive squares in only one way, i.e., 47018449 + 30614089 = 6857^2 + 5533^2 .

It is a junction number, because it is equal to n+sod(n) for n = 77632495 and 77632504.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19408133 + ... + 19408136.

Almost surely, 2^77632538 is an apocalyptic number.

77632538 is a deficient number, since it is larger than the sum of its proper divisors (38816272).

77632538 is a wasteful number, since it uses less digits than its factorization.

77632538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38816271.

The product of its digits is 211680, while the sum is 41.

The square root of 77632538 is about 8810.9328677502. The cubic root of 77632538 is about 426.5938546270.

It can be divided in two parts, 7763 and 2538, that added together give a palindrome (10301).

The spelling of 77632538 in words is "seventy-seven million, six hundred thirty-two thousand, five hundred thirty-eight".