27970820 has 12 divisors (see below), whose sum is σ = 58738764. Its totient is φ = 11188320.

The previous prime is 27970807. The next prime is 27970841. The reversal of 27970820 is 2807972.

It can be written as a sum of positive squares in 2 ways, for example, as 16908544 + 11062276 = 4112^2 + 3326^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 699251 + ... + 699290.

It is an arithmetic number, because the mean of its divisors is an integer number (4894897).

Almost surely, 2^27970820 is an apocalyptic number.

27970820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27970820 is an abundant number, since it is smaller than the sum of its proper divisors (30767944).

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

27970820 is a wasteful number, since it uses less digits than its factorization.

27970820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1398550 (or 1398548 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 27970820 is about 5288.7446525617. The cubic root of 27970820 is about 303.5533752058.

The spelling of 27970820 in words is "twenty-seven million, nine hundred seventy thousand, eight hundred twenty".