38728775 has 12 divisors (see below), whose sum is σ = 49680600. Its totient is φ = 29914080.

The previous prime is 38728769. The next prime is 38728787. The reversal of 38728775 is 57782783.

It is a happy number.

It is not a de Polignac number, because 38728775 - 2²⁰ = 37680199 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25985 + ... + 27434.

It is an arithmetic number, because the mean of its divisors is an integer number (4140050).

Almost surely, 2^38728775 is an apocalyptic number.

38728775 is a deficient number, since it is larger than the sum of its proper divisors (10951825).

38728775 is a wasteful number, since it uses less digits than its factorization.

38728775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53458 (or 53453 counting only the distinct ones).

The product of its digits is 658560, while the sum is 47.

The square root of 38728775 is about 6223.2447324527. The cubic root of 38728775 is about 338.3331769489. Note that the first 3 decimals are identical.

The spelling of 38728775 in words is "thirty-eight million, seven hundred twenty-eight thousand, seven hundred seventy-five".