77672406 has 32 divisors (see below), whose sum is σ = 177988608. Its totient is φ = 22135680.

The previous prime is 77672383. The next prime is 77672429. The reversal of 77672406 is 60427677.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (77672383) and next prime (77672429).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16051 + ... + 20321.

It is an arithmetic number, because the mean of its divisors is an integer number (5562144).

Almost surely, 2^77672406 is an apocalyptic number.

77672406 is an abundant number, since it is smaller than the sum of its proper divisors (100316202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77672406 is a wasteful number, since it uses less digits than its factorization.

77672406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4716.

The product of its (nonzero) digits is 98784, while the sum is 39.

The square root of 77672406 is about 8813.1949938714. The cubic root of 77672406 is about 426.6668675401. Note that the first 3 decimals are identical.

The spelling of 77672406 in words is "seventy-seven million, six hundred seventy-two thousand, four hundred six".