27963440 has 40 divisors (see below), whose sum is σ = 68440560. Its totient is φ = 10596096.

The previous prime is 27963433. The next prime is 27963443. The reversal of 27963440 is 4436972.

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

It is a self number, because there is not a number n which added to its sum of digits gives 27963440.

It is not an unprimeable number, because it can be changed into a prime (27963443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7679 + ... + 10718.

It is an arithmetic number, because the mean of its divisors is an integer number (1711014).

Almost surely, 2^27963440 is an apocalyptic number.

27963440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27963440 is an abundant number, since it is smaller than the sum of its proper divisors (40477120).

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

27963440 is a wasteful number, since it uses less digits than its factorization.

27963440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18429 (or 18423 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 27963440 is about 5288.0468984305. The cubic root of 27963440 is about 303.5266757030.

The spelling of 27963440 in words is "twenty-seven million, nine hundred sixty-three thousand, four hundred forty".