15664342 has 8 divisors (see below), whose sum is σ = 23584032. Its totient is φ = 7803000.

The previous prime is 15664339. The next prime is 15664351. The reversal of 15664342 is 24346651.

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

It is a super-2 number, since 2×15664342² = 490743220585928, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13909 + ... + 14992.

It is an arithmetic number, because the mean of its divisors is an integer number (2948004).

Almost surely, 2^15664342 is an apocalyptic number.

15664342 is a deficient number, since it is larger than the sum of its proper divisors (7919690).

15664342 is a wasteful number, since it uses less digits than its factorization.

15664342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29174.

The product of its digits is 17280, while the sum is 31.

The square root of 15664342 is about 3957.8203597435. The cubic root of 15664342 is about 250.2096481415.

The spelling of 15664342 in words is "fifteen million, six hundred sixty-four thousand, three hundred forty-two".