77872546 has 8 divisors (see below), whose sum is σ = 123679980. Its totient is φ = 36645888.

The previous prime is 77872493. The next prime is 77872547. The reversal of 77872546 is 64527877.

It can be written as a sum of positive squares in 2 ways, for example, as 60140025 + 17732521 = 7755^2 + 4211^2 .

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 = 77872496 and 77872505.

It is not an unprimeable number, because it can be changed into a prime (77872547) 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, 1145151 + ... + 1145218.

Almost surely, 2^77872546 is an apocalyptic number.

77872546 is a deficient number, since it is larger than the sum of its proper divisors (45807434).

77872546 is a wasteful number, since it uses less digits than its factorization.

77872546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2290388.

The product of its digits is 658560, while the sum is 46.

The square root of 77872546 is about 8824.5422544175. The cubic root of 77872546 is about 427.0330201691.

The spelling of 77872546 in words is "seventy-seven million, eight hundred seventy-two thousand, five hundred forty-six".