15950000 has 120 divisors (see below), whose sum is σ = 43590960. Its totient is φ = 5600000.

The previous prime is 15949993. The next prime is 15950009. The reversal of 15950000 is 5951.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15950009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 549986 + ... + 550014.

It is an arithmetic number, because the mean of its divisors is an integer number (363258).

Almost surely, 2^15950000 is an apocalyptic number.

15950000 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 15950000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21795480).

15950000 is an abundant number, since it is smaller than the sum of its proper divisors (27640960).

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

15950000 is an equidigital number, since it uses as much as digits as its factorization.

15950000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 20.

The square root of 15950000 is about 3993.7451095432. The cubic root of 15950000 is about 251.7214525309.

Adding to 15950000 its reverse (5951), we get a palindrome (15955951).

Subtracting from 15950000 its reverse (5951), we obtain a square (15944049 = 3993²).

The spelling of 15950000 in words is "fifteen million, nine hundred fifty thousand".