27640340 has 48 divisors (see below), whose sum is σ = 71444352. Its totient is φ = 8747136.

The previous prime is 27640339. The next prime is 27640363. The reversal of 27640340 is 4304672.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5774 + ... + 9413.

It is an arithmetic number, because the mean of its divisors is an integer number (1488424).

Almost surely, 2^27640340 is an apocalyptic number.

27640340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27640340 is an abundant number, since it is smaller than the sum of its proper divisors (43804012).

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

27640340 is a wasteful number, since it uses less digits than its factorization.

27640340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15216 (or 15214 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 27640340 is about 5257.4081066624. The cubic root of 27640340 is about 302.3531240620.

The spelling of 27640340 in words is "twenty-seven million, six hundred forty thousand, three hundred forty".