27996930 has 48 divisors (see below), whose sum is σ = 78394680. Its totient is φ = 6891264.

The previous prime is 27996923. The next prime is 27996931. The reversal of 27996930 is 3969972.

It can be written as a sum of positive squares in 4 ways, for example, as 20061441 + 7935489 = 4479^2 + 2817^2 .

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

It is not an unprimeable number, because it can be changed into a prime (27996931) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 10795 + ... + 13134.

Almost surely, 2^27996930 is an apocalyptic number.

27996930 is an abundant number, since it is smaller than the sum of its proper divisors (50397750).

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

27996930 is a wasteful number, since it uses less digits than its factorization.

27996930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23955 (or 23952 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 45.

The square root of 27996930 is about 5291.2125264442. The cubic root of 27996930 is about 303.6477987722.

The spelling of 27996930 in words is "twenty-seven million, nine hundred ninety-six thousand, nine hundred thirty".