2640276 has 60 divisors (see below), whose sum is σ = 7165620. Its totient is φ = 846720.

The previous prime is 2640271. The next prime is 2640289. The reversal of 2640276 is 6720462.

It can be written as a sum of positive squares in 2 ways, for example, as 1587600 + 1052676 = 1260^2 + 1026^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640271) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9256 + ... + 9536.

It is an arithmetic number, because the mean of its divisors is an integer number (119427).

2^2640276 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2640276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3582810).

2640276 is an abundant number, since it is smaller than the sum of its proper divisors (4525344).

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

2640276 is a wasteful number, since it uses less digits than its factorization.

2640276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326 (or 315 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 2640276 is about 1624.8926118362. The cubic root of 2640276 is about 138.2132807880.

It can be divided in two parts, 2640 and 276, that added together give a square (2916 = 54²).

The spelling of 2640276 in words is "two million, six hundred forty thousand, two hundred seventy-six".