27900040 has 32 divisors (see below), whose sum is σ = 71743680. Its totient is φ = 9565632.

The previous prime is 27900023. The next prime is 27900133. The reversal of 27900040 is 4000972.

It is a junction number, because it is equal to n+sod(n) for n = 27899984 and 27900020.

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 7 ways as a sum of consecutive naturals, for example, 49542 + ... + 50101.

It is an arithmetic number, because the mean of its divisors is an integer number (2241990).

Almost surely, 2^27900040 is an apocalyptic number.

27900040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27900040 is an abundant number, since it is smaller than the sum of its proper divisors (43843640).

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

27900040 is a wasteful number, since it uses less digits than its factorization.

27900040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99661 (or 99657 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 27900040 is about 5282.0488449086. The cubic root of 27900040 is about 303.2971122337.

The spelling of 27900040 in words is "twenty-seven million, nine hundred thousand, forty".