2734640 has 20 divisors (see below), whose sum is σ = 6358224. Its totient is φ = 1093824.

The previous prime is 2734619. The next prime is 2734643. The reversal of 2734640 is 464372.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2734643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17012 + ... + 17171.

2^2734640 is an apocalyptic number.

2734640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2734640 is an abundant number, since it is smaller than the sum of its proper divisors (3623584).

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

2734640 is a wasteful number, since it uses less digits than its factorization.

2734640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34196 (or 34190 counting only the distinct ones).

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

The square root of 2734640 is about 1653.6746959423. The cubic root of 2734640 is about 139.8406349867.

It can be divided in two parts, 273 and 4640, that added together give a cube (4913 = 17³).

The spelling of 2734640 in words is "two million, seven hundred thirty-four thousand, six hundred forty".