38866628 has 24 divisors (see below), whose sum is σ = 72021600. Its totient is φ = 18301248.

The previous prime is 38866621. The next prime is 38866643. The reversal of 38866628 is 82666883.

It is a happy number.

It is a super-2 number, since 2×38866628² = 3021229544180768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (38866621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12176 + ... + 15032.

It is an arithmetic number, because the mean of its divisors is an integer number (3000900).

Almost surely, 2^38866628 is an apocalyptic number.

38866628 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

38866628 is a deficient number, since it is larger than the sum of its proper divisors (33154972).

38866628 is a wasteful number, since it uses less digits than its factorization.

38866628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3059 (or 3057 counting only the distinct ones).

The product of its digits is 663552, while the sum is 47.

The square root of 38866628 is about 6234.3105472859. The cubic root of 38866628 is about 338.7341278766.

The spelling of 38866628 in words is "thirty-eight million, eight hundred sixty-six thousand, six hundred twenty-eight".