15801982 has 8 divisors (see below), whose sum is σ = 27089136. Its totient is φ = 6772272.

The previous prime is 15801967. The next prime is 15801983. The reversal of 15801982 is 28910851.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15801983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 564343 + ... + 564370.

It is an arithmetic number, because the mean of its divisors is an integer number (3386142).

Almost surely, 2^15801982 is an apocalyptic number.

15801982 is a deficient number, since it is larger than the sum of its proper divisors (11287154).

15801982 is a wasteful number, since it uses less digits than its factorization.

15801982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128722.

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 15801982 is about 3975.1706881592. The cubic root of 15801982 is about 250.9403624390.

The spelling of 15801982 in words is "fifteen million, eight hundred one thousand, nine hundred eighty-two".