27700380 has 60 divisors (see below), whose sum is σ = 86902200. Its totient is φ = 7386336.

The previous prime is 27700373. The next prime is 27700399. The reversal of 27700380 is 8300772.

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×27700380² = 1534622104288800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6930 + ... + 10169.

It is an arithmetic number, because the mean of its divisors is an integer number (1448370).

Almost surely, 2^27700380 is an apocalyptic number.

27700380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27700380 is an abundant number, since it is smaller than the sum of its proper divisors (59201820).

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

27700380 is a wasteful number, since it uses less digits than its factorization.

27700380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17120 (or 17109 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 27700380 is about 5263.1150471940. The cubic root of 27700380 is about 302.5718882945.

The spelling of 27700380 in words is "twenty-seven million, seven hundred thousand, three hundred eighty".