27479280 has 80 divisors (see below), whose sum is σ = 86628384. Its totient is φ = 7203840.

The previous prime is 27479261. The next prime is 27479311. The reversal of 27479280 is 8297472.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×27479280² = 1510221658636800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13702 + ... + 15578.

Almost surely, 2^27479280 is an apocalyptic number.

27479280 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 27479280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43314192).

27479280 is an abundant number, since it is smaller than the sum of its proper divisors (59149104).

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

27479280 is a wasteful number, since it uses less digits than its factorization.

27479280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1954 (or 1948 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 27479280 is about 5242.0682940992. The cubic root of 27479280 is about 301.7647100845.

The spelling of 27479280 in words is "twenty-seven million, four hundred seventy-nine thousand, two hundred eighty".