15998434 has 8 divisors (see below), whose sum is σ = 24022620. Its totient is φ = 7990896.

The previous prime is 15998429. The next prime is 15998443. The reversal of 15998434 is 43489951.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15642025 + 356409 = 3955^2 + 597^2 .

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

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, 1389 + ... + 5824.

Almost surely, 2^15998434 is an apocalyptic number.

15998434 is a deficient number, since it is larger than the sum of its proper divisors (8024186).

15998434 is a wasteful number, since it uses less digits than its factorization.

15998434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8324.

The product of its digits is 155520, while the sum is 43.

The square root of 15998434 is about 3999.8042452100. The cubic root of 15998434 is about 251.9759887259.

The spelling of 15998434 in words is "fifteen million, nine hundred ninety-eight thousand, four hundred thirty-four".