15921948 has 24 divisors (see below), whose sum is σ = 42458752. Its totient is φ = 4549104.

The previous prime is 15921937. The next prime is 15921949. The reversal of 15921948 is 84912951.

It is a super-2 number, since 2×15921948² = 507016856229408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15921949) 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, 94690 + ... + 94857.

Almost surely, 2^15921948 is an apocalyptic number.

It is an amenable number.

15921948 is an abundant number, since it is smaller than the sum of its proper divisors (26536804).

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

15921948 is a wasteful number, since it uses less digits than its factorization.

15921948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189561 (or 189559 counting only the distinct ones).

The product of its digits is 25920, while the sum is 39.

The square root of 15921948 is about 3990.2315722274. The cubic root of 15921948 is about 251.5737945600.

The spelling of 15921948 in words is "fifteen million, nine hundred twenty-one thousand, nine hundred forty-eight".