27971490 has 32 divisors (see below), whose sum is σ = 67493376. Its totient is φ = 7418880.

The previous prime is 27971479. The next prime is 27971497. The reversal of 27971490 is 9417972.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (27971497) 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, 3375 + ... + 8205.

It is an arithmetic number, because the mean of its divisors is an integer number (2109168).

Almost surely, 2^27971490 is an apocalyptic number.

27971490 is an abundant number, since it is smaller than the sum of its proper divisors (39521886).

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

27971490 is a wasteful number, since it uses less digits than its factorization.

27971490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5034.

The product of its (nonzero) digits is 31752, while the sum is 39.

The square root of 27971490 is about 5288.8079942460. The cubic root of 27971490 is about 303.5557989119. Note that the first 3 decimals are identical.

The spelling of 27971490 in words is "twenty-seven million, nine hundred seventy-one thousand, four hundred ninety".