27929970 has 24 divisors (see below), whose sum is σ = 72618156. Its totient is φ = 7447968.

The previous prime is 27929969. The next prime is 27929971. The reversal of 27929970 is 7992972.

It is an interprime number because it is at equal distance from previous prime (27929969) and next prime (27929971).

It can be written as a sum of positive squares in 2 ways, for example, as 27910089 + 19881 = 5283^2 + 141^2 .

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 (27929971) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 155077 + ... + 155256.

Almost surely, 2^27929970 is an apocalyptic number.

27929970 is an abundant number, since it is smaller than the sum of its proper divisors (44688186).

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

27929970 is a wasteful number, since it uses less digits than its factorization.

27929970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310346 (or 310343 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 45.

The square root of 27929970 is about 5284.8812664051. The cubic root of 27929970 is about 303.4055283082.

The spelling of 27929970 in words is "twenty-seven million, nine hundred twenty-nine thousand, nine hundred seventy".