38787490 has 32 divisors (see below), whose sum is σ = 80175744. Its totient is φ = 13234560.

The previous prime is 38787481. The next prime is 38787491. The reversal of 38787490 is 9478783.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 38787490.

It is not an unprimeable number, because it can be changed into a prime (38787491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14670 + ... + 17110.

It is an arithmetic number, because the mean of its divisors is an integer number (2505492).

Almost surely, 2^38787490 is an apocalyptic number.

38787490 is an abundant number, since it is smaller than the sum of its proper divisors (41388254).

38787490 is a wasteful number, since it uses less digits than its factorization.

38787490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2682.

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 38787490 is about 6227.9603402719. The cubic root of 38787490 is about 338.5040679896.

The spelling of 38787490 in words is "thirty-eight million, seven hundred eighty-seven thousand, four hundred ninety".