2640003220 has 24 divisors (see below), whose sum is σ = 5545588608. Its totient is φ = 1055700000.

The previous prime is 2640003209. The next prime is 2640003221. The reversal of 2640003220 is 223000462.

It is a super-2 number, since 2×2640003220² = 13939234003220736800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640003221) 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, 61345 + ... + 95095.

It is an arithmetic number, because the mean of its divisors is an integer number (231066192).

Almost surely, 2^2640003220 is an apocalyptic number.

2640003220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2640003220 is an abundant number, since it is smaller than the sum of its proper divisors (2905585388).

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

2640003220 is a wasteful number, since it uses less digits than its factorization.

2640003220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37671 (or 37669 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 2640003220 is about 51380.9616492335. The cubic root of 2640003220 is about 1382.0852079102.

Adding to 2640003220 its reverse (223000462), we get a palindrome (2863003682).

The spelling of 2640003220 in words is "two billion, six hundred forty million, three thousand, two hundred twenty".