93991628 has 12 divisors (see below), whose sum is σ = 169791552. Its totient is φ = 45479760.

The previous prime is 93991619. The next prime is 93991643. The reversal of 93991628 is 82619939.

It is a super-2 number, since 2×93991628² = 17668852268180768, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 378875 + ... + 379122.

It is an arithmetic number, because the mean of its divisors is an integer number (14149296).

Almost surely, 2^93991628 is an apocalyptic number.

It is an amenable number.

93991628 is a deficient number, since it is larger than the sum of its proper divisors (75799924).

93991628 is a wasteful number, since it uses less digits than its factorization.

93991628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758032 (or 758030 counting only the distinct ones).

The product of its digits is 209952, while the sum is 47.

The square root of 93991628 is about 9694.9279522852. The cubic root of 93991628 is about 454.6700953561.

The spelling of 93991628 in words is "ninety-three million, nine hundred ninety-one thousand, six hundred twenty-eight".