38501890 has 16 divisors (see below), whose sum is σ = 79204032. Its totient is φ = 13200624.

The previous prime is 38501857. The next prime is 38501909. The reversal of 38501890 is 9810583.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274944 + ... + 275083.

It is an arithmetic number, because the mean of its divisors is an integer number (4950252).

Almost surely, 2^38501890 is an apocalyptic number.

38501890 is an abundant number, since it is smaller than the sum of its proper divisors (40702142).

38501890 is a wasteful number, since it uses less digits than its factorization.

38501890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550041.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 38501890 is about 6204.9891216665. The cubic root of 38501890 is about 337.6711961825.

The spelling of 38501890 in words is "thirty-eight million, five hundred one thousand, eight hundred ninety".