2640480 has 48 divisors (see below), whose sum is σ = 8319024. Its totient is φ = 704000.

The previous prime is 2640409. The next prime is 2640497. The reversal of 2640480 is 840462.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 2640480.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2271 + ... + 3230.

It is an arithmetic number, because the mean of its divisors is an integer number (173313).

2^2640480 is an apocalyptic number.

2640480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2640480 is an abundant number, since it is smaller than the sum of its proper divisors (5678544).

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

2640480 is a wasteful number, since it uses less digits than its factorization.

2640480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5519 (or 5511 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 2640480 is about 1624.9553840029. The cubic root of 2640480 is about 138.2168403632.

The spelling of 2640480 in words is "two million, six hundred forty thousand, four hundred eighty".