15891442 has 8 divisors (see below), whose sum is σ = 27242496. Its totient is φ = 6810612.

The previous prime is 15891439. The next prime is 15891451. The reversal of 15891442 is 24419851.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 15891398 and 15891407.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 567538 + ... + 567565.

It is an arithmetic number, because the mean of its divisors is an integer number (3405312).

Almost surely, 2^15891442 is an apocalyptic number.

15891442 is a deficient number, since it is larger than the sum of its proper divisors (11351054).

15891442 is a wasteful number, since it uses less digits than its factorization.

15891442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135112.

The product of its digits is 11520, while the sum is 34.

The square root of 15891442 is about 3986.4071543183. The cubic root of 15891442 is about 251.4130224237.

The spelling of 15891442 in words is "fifteen million, eight hundred ninety-one thousand, four hundred forty-two".