38213890 has 32 divisors (see below), whose sum is σ = 80813376. Its totient is φ = 12826560.

The previous prime is 38213869. The next prime is 38213893. The reversal of 38213890 is 9831283.

It is not an unprimeable number, because it can be changed into a prime (38213893) 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, 11932 + ... + 14791.

It is an arithmetic number, because the mean of its divisors is an integer number (2525418).

Almost surely, 2^38213890 is an apocalyptic number.

38213890 is an abundant number, since it is smaller than the sum of its proper divisors (42599486).

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

38213890 is a wasteful number, since it uses less digits than its factorization.

38213890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26754.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 38213890 is about 6181.7384286299. The cubic root of 38213890 is about 336.8271441366.

The spelling of 38213890 in words is "thirty-eight million, two hundred thirteen thousand, eight hundred ninety".