15001890 has 32 divisors (see below), whose sum is σ = 36205056. Its totient is φ = 3978240.

The previous prime is 15001873. The next prime is 15001891. The reversal of 15001890 is 9810051.

It is a self number, because there is not a number n which added to its sum of digits gives 15001890.

It is not an unprimeable number, because it can be changed into a prime (15001891) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4495 + ... + 7085.

It is an arithmetic number, because the mean of its divisors is an integer number (1131408).

Almost surely, 2^15001890 is an apocalyptic number.

15001890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15001890 is an abundant number, since it is smaller than the sum of its proper divisors (21203166).

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

15001890 is a wasteful number, since it uses less digits than its factorization.

15001890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2794.

The product of its (nonzero) digits is 360, while the sum is 24.

The square root of 15001890 is about 3873.2273364728. The cubic root of 15001890 is about 246.6315650887.

The spelling of 15001890 in words is "fifteen million, one thousand, eight hundred ninety".