77890628 has 12 divisors (see below), whose sum is σ = 136389120. Its totient is φ = 38922312.

The previous prime is 77890619. The next prime is 77890639. The reversal of 77890628 is 82609877.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3533 + ... + 12971.

It is an arithmetic number, because the mean of its divisors is an integer number (11365760).

Almost surely, 2^77890628 is an apocalyptic number.

It is an amenable number.

77890628 is a deficient number, since it is larger than the sum of its proper divisors (58498492).

77890628 is a wasteful number, since it uses less digits than its factorization.

77890628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11506 (or 11504 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 47.

The square root of 77890628 is about 8825.5667240127. The cubic root of 77890628 is about 427.0660699575.

The spelling of 77890628 in words is "seventy-seven million, eight hundred ninety thousand, six hundred twenty-eight".