27730740 has 96 divisors (see below), whose sum is σ = 84962304. Its totient is φ = 6727680.

The previous prime is 27730739. The next prime is 27730751. The reversal of 27730740 is 4703772.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 27730698 and 27730707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31182 + ... + 32058.

It is an arithmetic number, because the mean of its divisors is an integer number (885024).

Almost surely, 2^27730740 is an apocalyptic number.

27730740 is a gapful number since it is divisible by the number (20) 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 27730740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42481152).

27730740 is an abundant number, since it is smaller than the sum of its proper divisors (57231564).

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

27730740 is a wasteful number, since it uses less digits than its factorization.

27730740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937 (or 935 counting only the distinct ones).

The product of its (nonzero) digits is 8232, while the sum is 30.

The square root of 27730740 is about 5265.9984808201. The cubic root of 27730740 is about 302.6823889271.

The spelling of 27730740 in words is "twenty-seven million, seven hundred thirty thousand, seven hundred forty".