15939442 has 8 divisors (see below), whose sum is σ = 25167600. Its totient is φ = 7550244.

The previous prime is 15939433. The next prime is 15939449. The reversal of 15939442 is 24493951.

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

It is a super-2 number, since 2×15939442² = 508131622542728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15939449) 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, 209692 + ... + 209767.

It is an arithmetic number, because the mean of its divisors is an integer number (3145950).

Almost surely, 2^15939442 is an apocalyptic number.

15939442 is a deficient number, since it is larger than the sum of its proper divisors (9228158).

15939442 is a wasteful number, since it uses less digits than its factorization.

15939442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419480.

The product of its digits is 38880, while the sum is 37.

The square root of 15939442 is about 3992.4230737736. The cubic root of 15939442 is about 251.6658984719.

It can be divided in two parts, 159 and 39442, that added together give a square (39601 = 199²).

The spelling of 15939442 in words is "fifteen million, nine hundred thirty-nine thousand, four hundred forty-two".