27972142 has 16 divisors (see below), whose sum is σ = 48182400. Its totient is φ = 12045240.

The previous prime is 27972107. The next prime is 27972169. The reversal of 27972142 is 24127972.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 27972098 and 27972107.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33042 + ... + 33877.

It is an arithmetic number, because the mean of its divisors is an integer number (3011400).

Almost surely, 2^27972142 is an apocalyptic number.

27972142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

27972142 is a deficient number, since it is larger than the sum of its proper divisors (20210258).

27972142 is a wasteful number, since it uses less digits than its factorization.

27972142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66951.

The product of its digits is 14112, while the sum is 34.

The square root of 27972142 is about 5288.8696334850. The cubic root of 27972142 is about 303.5581574663.

The spelling of 27972142 in words is "twenty-seven million, nine hundred seventy-two thousand, one hundred forty-two".