15980436 has 48 divisors (see below), whose sum is σ = 41977600. Its totient is φ = 5256576.

The previous prime is 15980431. The next prime is 15980449. The reversal of 15980436 is 63408951.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 15980436.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15980431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7596 + ... + 9468.

Almost surely, 2^15980436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15980436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20988800).

15980436 is an abundant number, since it is smaller than the sum of its proper divisors (25997164).

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

15980436 is a wasteful number, since it uses less digits than its factorization.

15980436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1965 (or 1957 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 15980436 is about 3997.5537519838. The cubic root of 15980436 is about 251.8814635256.

The spelling of 15980436 in words is "fifteen million, nine hundred eighty thousand, four hundred thirty-six".