27748480 has 64 divisors (see below), whose sum is σ = 66977280. Its totient is φ = 10992640.

The previous prime is 27748453. The next prime is 27748481. The reversal of 27748480 is 8484772.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27748481) 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, 122127 + ... + 122353.

It is an arithmetic number, because the mean of its divisors is an integer number (1046520).

Almost surely, 2^27748480 is an apocalyptic number.

27748480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27748480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33488640).

27748480 is an abundant number, since it is smaller than the sum of its proper divisors (39228800).

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

27748480 is a wasteful number, since it uses less digits than its factorization.

27748480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437 (or 425 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 40.

The square root of 27748480 is about 5267.6826024353. The cubic root of 27748480 is about 302.7469194923.

The spelling of 27748480 in words is "twenty-seven million, seven hundred forty-eight thousand, four hundred eighty".