77449898 has 4 divisors (see below), whose sum is σ = 116174850. Its totient is φ = 38724948.

The previous prime is 77449891. The next prime is 77449919. The reversal of 77449898 is 89894477.

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., 73736569 + 3713329 = 8587^2 + 1927^2 .

It is not an unprimeable number, because it can be changed into a prime (77449891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19362473 + ... + 19362476.

Almost surely, 2^77449898 is an apocalyptic number.

77449898 is a deficient number, since it is larger than the sum of its proper divisors (38724952).

77449898 is a wasteful number, since it uses less digits than its factorization.

77449898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38724951.

The product of its digits is 4064256, while the sum is 56.

The square root of 77449898 is about 8800.5623683944. The cubic root of 77449898 is about 426.2590539381.

The spelling of 77449898 in words is "seventy-seven million, four hundred forty-nine thousand, eight hundred ninety-eight".