27977620 has 48 divisors (see below), whose sum is σ = 64685376. Its totient is φ = 10164000.

The previous prime is 27977561. The next prime is 27977627. The reversal of 27977620 is 2677972.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27977627) 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, 26095 + ... + 27145.

It is an arithmetic number, because the mean of its divisors is an integer number (1347612).

Almost surely, 2^27977620 is an apocalyptic number.

27977620 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 27977620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32342688).

27977620 is an abundant number, since it is smaller than the sum of its proper divisors (36707756).

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

27977620 is a wasteful number, since it uses less digits than its factorization.

27977620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093 (or 1069 counting only the distinct ones).

The product of its (nonzero) digits is 74088, while the sum is 40.

The square root of 27977620 is about 5289.3874881691. The cubic root of 27977620 is about 303.5779722168.

The spelling of 27977620 in words is "twenty-seven million, nine hundred seventy-seven thousand, six hundred twenty".