27172992 has 128 divisors (see below), whose sum is σ = 90086400. Its totient is φ = 7050240.

The previous prime is 27172973. The next prime is 27172993. The reversal of 27172992 is 29927172.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 27172992.

It is not an unprimeable number, because it can be changed into a prime (27172993) 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, 29109 + ... + 30027.

It is an arithmetic number, because the mean of its divisors is an integer number (703800).

Almost surely, 2^27172992 is an apocalyptic number.

27172992 is a gapful number since it is divisible by the number (22) 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 27172992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45043200).

27172992 is an abundant number, since it is smaller than the sum of its proper divisors (62913408).

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

27172992 is a wasteful number, since it uses less digits than its factorization.

27172992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954 (or 942 counting only the distinct ones).

The product of its digits is 31752, while the sum is 39.

The square root of 27172992 is about 5212.7720072913. The cubic root of 27172992 is about 300.6393475920.

The spelling of 27172992 in words is "twenty-seven million, one hundred seventy-two thousand, nine hundred ninety-two".