27450640 has 40 divisors (see below), whose sum is σ = 72941760. Its totient is φ = 9411456.

The previous prime is 27450629. The next prime is 27450653. The reversal of 27450640 is 4605472.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 27450599 and 27450608.

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, 23950 + ... + 25069.

It is an arithmetic number, because the mean of its divisors is an integer number (1823544).

Almost surely, 2^27450640 is an apocalyptic number.

27450640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27450640 is an abundant number, since it is smaller than the sum of its proper divisors (45491120).

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

27450640 is a wasteful number, since it uses less digits than its factorization.

27450640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49039 (or 49033 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 27450640 is about 5239.3358357716. The cubic root of 27450640 is about 301.6598365753.

The spelling of 27450640 in words is "twenty-seven million, four hundred fifty thousand, six hundred forty".