38151890 has 48 divisors (see below), whose sum is σ = 80471232. Its totient is φ = 13023024.

The previous prime is 38151833. The next prime is 38151913. The reversal of 38151890 is 9815183.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a nialpdrome in base 7.

It is a self number, because there is not a number n which added to its sum of digits gives 38151890.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 167957 + ... + 168183.

It is an arithmetic number, because the mean of its divisors is an integer number (1676484).

Almost surely, 2^38151890 is an apocalyptic number.

38151890 is an abundant number, since it is smaller than the sum of its proper divisors (42319342).

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

38151890 is an frugal number, since it uses more digits than its factorization.

38151890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 38151890 is about 6176.7216223495. The cubic root of 38151890 is about 336.6448841684.

The spelling of 38151890 in words is "thirty-eight million, one hundred fifty-one thousand, eight hundred ninety".