77456738 has 8 divisors (see below), whose sum is σ = 120191580. Its totient is φ = 37392880.

The previous prime is 77456737. The next prime is 77456747. The reversal of 77456738 is 83765477.

It can be written as a sum of positive squares in 2 ways, for example, as 76510009 + 946729 = 8747^2 + 973^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 77456692 and 77456701.

It is not an unprimeable number, because it can be changed into a prime (77456737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 667673 + ... + 667788.

Almost surely, 2^77456738 is an apocalyptic number.

77456738 is a deficient number, since it is larger than the sum of its proper divisors (42734842).

77456738 is a wasteful number, since it uses less digits than its factorization.

77456738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335492.

The product of its digits is 987840, while the sum is 47.

The square root of 77456738 is about 8800.9509713439. The cubic root of 77456738 is about 426.2716019473.

The spelling of 77456738 in words is "seventy-seven million, four hundred fifty-six thousand, seven hundred thirty-eight".