15997458 has 16 divisors (see below), whose sum is σ = 32240736. Its totient is φ = 5291520.

The previous prime is 15997451. The next prime is 15997469. The reversal of 15997458 is 85479951.

It is not an unprimeable number, because it can be changed into a prime (15997451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9391 + ... + 10962.

It is an arithmetic number, because the mean of its divisors is an integer number (2015046).

Almost surely, 2^15997458 is an apocalyptic number.

15997458 is an abundant number, since it is smaller than the sum of its proper divisors (16243278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15997458 is a wasteful number, since it uses less digits than its factorization.

15997458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20489.

The product of its digits is 453600, while the sum is 48.

The square root of 15997458 is about 3999.6822373784. The cubic root of 15997458 is about 251.9708646084.

The spelling of 15997458 in words is "fifteen million, nine hundred ninety-seven thousand, four hundred fifty-eight".