15609998 has 8 divisors (see below), whose sum is σ = 23457720. Its totient is φ = 7790760.

The previous prime is 15609949. The next prime is 15610027. The reversal of 15609998 is 89990651.

15609998 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

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, 5693 + ... + 7976.

It is an arithmetic number, because the mean of its divisors is an integer number (2932215).

Almost surely, 2^15609998 is an apocalyptic number.

15609998 is a deficient number, since it is larger than the sum of its proper divisors (7847722).

15609998 is a wasteful number, since it uses less digits than its factorization.

15609998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14242.

The product of its (nonzero) digits is 174960, while the sum is 47.

The square root of 15609998 is about 3950.9489999239. The cubic root of 15609998 is about 249.9199637128.

The spelling of 15609998 in words is "fifteen million, six hundred nine thousand, nine hundred ninety-eight".