27650640 has 40 divisors (see below), whose sum is σ = 85717728. Its totient is φ = 7373440.

The previous prime is 27650639. The next prime is 27650657. The reversal of 27650640 is 4605672.

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 (30).

It is a junction number, because it is equal to n+sod(n) for n = 27650598 and 27650607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57366 + ... + 57845.

Almost surely, 2^27650640 is an apocalyptic number.

27650640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27650640 is an abundant number, since it is smaller than the sum of its proper divisors (58067088).

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

27650640 is a wasteful number, since it uses less digits than its factorization.

27650640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115227 (or 115221 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 27650640 is about 5258.3875855627. The cubic root of 27650640 is about 302.3906760654.

The spelling of 27650640 in words is "twenty-seven million, six hundred fifty thousand, six hundred forty".