77690224 has 20 divisors (see below), whose sum is σ = 150686536. Its totient is φ = 38803392.

The previous prime is 77690219. The next prime is 77690227. The reversal of 77690224 is 42209677.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77690227) 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, 17407 + ... + 21409.

Almost surely, 2^77690224 is an apocalyptic number.

It is an amenable number.

77690224 is a deficient number, since it is larger than the sum of its proper divisors (72996312).

77690224 is a wasteful number, since it uses less digits than its factorization.

77690224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5224 (or 5218 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 77690224 is about 8814.2058065375. The cubic root of 77690224 is about 426.6994907473.

The spelling of 77690224 in words is "seventy-seven million, six hundred ninety thousand, two hundred twenty-four".