38905866 has 32 divisors (see below), whose sum is σ = 86731200. Its totient is φ = 12927600.

The previous prime is 38905859. The next prime is 38905871. The reversal of 38905866 is 66850983.

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, 19516 + ... + 21416.

It is an arithmetic number, because the mean of its divisors is an integer number (2710350).

Almost surely, 2^38905866 is an apocalyptic number.

38905866 is an abundant number, since it is smaller than the sum of its proper divisors (47825334).

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

38905866 is a wasteful number, since it uses less digits than its factorization.

38905866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2291 (or 2285 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 38905866 is about 6237.4566932364. The cubic root of 38905866 is about 338.8480797864.

The spelling of 38905866 in words is "thirty-eight million, nine hundred five thousand, eight hundred sixty-six".