27720792 has 80 divisors (see below), whose sum is σ = 84724200. Its totient is φ = 8398080.

The previous prime is 27720787. The next prime is 27720799. The reversal of 27720792 is 29702772.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27720799) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5184 + ... + 9072.

Almost surely, 2^27720792 is an apocalyptic number.

27720792 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 27720792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42362100).

27720792 is an abundant number, since it is smaller than the sum of its proper divisors (57003408).

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

27720792 is a wasteful number, since it uses less digits than its factorization.

27720792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3918 (or 3905 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 36.

The square root of 27720792 is about 5265.0538458785. The cubic root of 27720792 is about 302.6461902954.

The spelling of 27720792 in words is "twenty-seven million, seven hundred twenty thousand, seven hundred ninety-two".