38815490 has 32 divisors (see below), whose sum is σ = 83324160. Its totient is φ = 12729024.

The previous prime is 38815489. The next prime is 38815493. The reversal of 38815490 is 9451883.

It is not an unprimeable number, because it can be changed into a prime (38815493) 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, 10445 + ... + 13664.

It is an arithmetic number, because the mean of its divisors is an integer number (2603880).

Almost surely, 2^38815490 is an apocalyptic number.

38815490 is an abundant number, since it is smaller than the sum of its proper divisors (44508670).

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

38815490 is a wasteful number, since it uses less digits than its factorization.

38815490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24146.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 38815490 is about 6230.2078617009. The cubic root of 38815490 is about 338.5855017553.

The spelling of 38815490 in words is "thirty-eight million, eight hundred fifteen thousand, four hundred ninety".