15001992 has 48 divisors (see below), whose sum is σ = 40950000. Its totient is φ = 4961376.

The previous prime is 15001991. The next prime is 15002017. The reversal of 15001992 is 29910051.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (15001991) 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 11 ways as a sum of consecutive naturals, for example, 9259 + ... + 10757.

It is an arithmetic number, because the mean of its divisors is an integer number (853125).

Almost surely, 2^15001992 is an apocalyptic number.

15001992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15001992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20475000).

15001992 is an abundant number, since it is smaller than the sum of its proper divisors (25948008).

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

15001992 is a wasteful number, since it uses less digits than its factorization.

15001992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650 (or 1643 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The square root of 15001992 is about 3873.2405037643. The cubic root of 15001992 is about 246.6321240486.

The spelling of 15001992 in words is "fifteen million, one thousand, nine hundred ninety-two".