27280830 has 32 divisors (see below), whose sum is σ = 66376224. Its totient is φ = 7174656.

The previous prime is 27280819. The next prime is 27280831. The reversal of 27280830 is 3808272.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27280831) 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, 4039 + ... + 8418.

It is an arithmetic number, because the mean of its divisors is an integer number (2074257).

Almost surely, 2^27280830 is an apocalyptic number.

27280830 is an abundant number, since it is smaller than the sum of its proper divisors (39095394).

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

27280830 is a wasteful number, since it uses less digits than its factorization.

27280830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12540.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 27280830 is about 5223.1053981324. The cubic root of 27280830 is about 301.0365257015.

The spelling of 27280830 in words is "twenty-seven million, two hundred eighty thousand, eight hundred thirty".