15971490 has 48 divisors (see below), whose sum is σ = 42501888. Its totient is φ = 4159008.

The previous prime is 15971471. The next prime is 15971513. The reversal of 15971490 is 9417951.

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 23 ways as a sum of consecutive naturals, for example, 1807 + ... + 5933.

It is an arithmetic number, because the mean of its divisors is an integer number (885456).

Almost surely, 2^15971490 is an apocalyptic number.

15971490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 15971490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21250944).

15971490 is an abundant number, since it is smaller than the sum of its proper divisors (26530398).

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

15971490 is a wasteful number, since it uses less digits than its factorization.

15971490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4183 (or 4180 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The square root of 15971490 is about 3996.4346610448. The cubic root of 15971490 is about 251.8344528729.

It can be divided in two parts, 15971 and 490, that added together give a palindrome (16461).

The spelling of 15971490 in words is "fifteen million, nine hundred seventy-one thousand, four hundred ninety".