15891948 has 18 divisors (see below), whose sum is σ = 40171404. Its totient is φ = 5297304.

The previous prime is 15891947. The next prime is 15891959. The reversal of 15891948 is 84919851.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×15891948² = 505108022469408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15891947) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 220686 + ... + 220757.

Almost surely, 2^15891948 is an apocalyptic number.

15891948 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

15891948 is an abundant number, since it is smaller than the sum of its proper divisors (24279456).

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

15891948 is a wasteful number, since it uses less digits than its factorization.

15891948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441453 (or 441448 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The square root of 15891948 is about 3986.4706194829. The cubic root of 15891948 is about 251.4156908125.

The spelling of 15891948 in words is "fifteen million, eight hundred ninety-one thousand, nine hundred forty-eight".