27971480 has 16 divisors (see below), whose sum is σ = 62935920. Its totient is φ = 11188576.

The previous prime is 27971479. The next prime is 27971497. The reversal of 27971480 is 8417972.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 349604 + ... + 349683.

It is an arithmetic number, because the mean of its divisors is an integer number (3933495).

Almost surely, 2^27971480 is an apocalyptic number.

27971480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27971480 is an abundant number, since it is smaller than the sum of its proper divisors (34964440).

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

27971480 is a wasteful number, since it uses less digits than its factorization.

27971480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699298 (or 699294 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 27971480 is about 5288.8070488533. The cubic root of 27971480 is about 303.5557627375. Note that the first 3 decimals are identical.

The spelling of 27971480 in words is "twenty-seven million, nine hundred seventy-one thousand, four hundred eighty".