15973140 has 48 divisors (see below), whose sum is σ = 45577728. Its totient is φ = 4178304.

The previous prime is 15973127. The next prime is 15973147. The reversal of 15973140 is 4137951.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 15973098 and 15973107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15973147) 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, 669 + ... + 5691.

It is an arithmetic number, because the mean of its divisors is an integer number (949536).

Almost surely, 2^15973140 is an apocalyptic number.

15973140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15973140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22788864).

15973140 is an abundant number, since it is smaller than the sum of its proper divisors (29604588).

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

15973140 is a wasteful number, since it uses less digits than its factorization.

15973140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5088 (or 5086 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 15973140 is about 3996.6410897152. The cubic root of 15973140 is about 251.8431248364.

The spelling of 15973140 in words is "fifteen million, nine hundred seventy-three thousand, one hundred forty".