27977980 has 24 divisors (see below), whose sum is σ = 59561712. Its totient is φ = 11037312.

The previous prime is 27977923. The next prime is 27977981. The reversal of 27977980 is 8977972.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27977981) 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, 8122 + ... + 11041.

It is an arithmetic number, because the mean of its divisors is an integer number (2481738).

Almost surely, 2^27977980 is an apocalyptic number.

27977980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27977980 is an abundant number, since it is smaller than the sum of its proper divisors (31583732).

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

27977980 is a wasteful number, since it uses less digits than its factorization.

27977980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19245 (or 19243 counting only the distinct ones).

The product of its (nonzero) digits is 444528, while the sum is 49.

The square root of 27977980 is about 5289.4215184649. The cubic root of 27977980 is about 303.5792743004.

The spelling of 27977980 in words is "twenty-seven million, nine hundred seventy-seven thousand, nine hundred eighty".