2747440 has 40 divisors (see below), whose sum is σ = 6504048. Its totient is φ = 1079040.

The previous prime is 2747429. The next prime is 2747441. The reversal of 2747440 is 447472.

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

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 2747399 and 2747408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2747441) 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, 4599 + ... + 5161.

2^2747440 is an apocalyptic number.

2747440 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 2747440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3252024).

2747440 is an abundant number, since it is smaller than the sum of its proper divisors (3756608).

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

2747440 is a wasteful number, since it uses less digits than its factorization.

2747440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637 (or 631 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 28.

The square root of 2747440 is about 1657.5403464169. The cubic root of 2747440 is about 140.0584789709.

Subtracting from 2747440 its reverse (447472), we obtain a cube (2299968 = 132³).

The spelling of 2747440 in words is "two million, seven hundred forty-seven thousand, four hundred forty".