15974228988 has 18 divisors (see below), whose sum is σ = 40379301144. Its totient is φ = 5324742984.

The previous prime is 15974228957. The next prime is 15974228989. The reversal of 15974228988 is 88982247951.

15974228988 is a `hidden beast` number, since 1 + 59 + 7 + 422 + 89 + 88 = 666.

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

It is a super-2 number, since 2×15974228988² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15974228989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 221864256 + ... + 221864327.

It is an arithmetic number, because the mean of its divisors is an integer number (2243294508).

Almost surely, 2^15974228988 is an apocalyptic number.

15974228988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

15974228988 is an abundant number, since it is smaller than the sum of its proper divisors (24405072156).

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

15974228988 is a wasteful number, since it uses less digits than its factorization.

15974228988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443728593 (or 443728588 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 63.

The spelling of 15974228988 in words is "fifteen billion, nine hundred seventy-four million, two hundred twenty-eight thousand, nine hundred eighty-eight".