27992742 has 16 divisors (see below), whose sum is σ = 57288000. Its totient is φ = 9113832.

The previous prime is 27992729. The next prime is 27992747. The reversal of 27992742 is 24729972.

It is a junction number, because it is equal to n+sod(n) for n = 27992694 and 27992703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27992747) 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, 53992 + ... + 54507.

It is an arithmetic number, because the mean of its divisors is an integer number (3580500).

Almost surely, 2^27992742 is an apocalyptic number.

27992742 is an abundant number, since it is smaller than the sum of its proper divisors (29295258).

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

27992742 is a wasteful number, since it uses less digits than its factorization.

27992742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108547.

The product of its digits is 127008, while the sum is 42.

The square root of 27992742 is about 5290.8167611438. The cubic root of 27992742 is about 303.6326573455.

The spelling of 27992742 in words is "twenty-seven million, nine hundred ninety-two thousand, seven hundred forty-two".