27897480 has 128 divisors (see below), whose sum is σ = 100195200. Its totient is φ = 6863616.

The previous prime is 27897479. The next prime is 27897509. The reversal of 27897480 is 8479872.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 13047 + ... + 15033.

It is an arithmetic number, because the mean of its divisors is an integer number (782775).

Almost surely, 2^27897480 is an apocalyptic number.

27897480 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 27897480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50097600).

27897480 is an abundant number, since it is smaller than the sum of its proper divisors (72297720).

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

27897480 is a wasteful number, since it uses less digits than its factorization.

27897480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020 (or 2010 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 27897480 is about 5281.8065091406. The cubic root of 27897480 is about 303.2878354924.

The spelling of 27897480 in words is "twenty-seven million, eight hundred ninety-seven thousand, four hundred eighty".