2640420402 has 32 divisors (see below), whose sum is σ = 5359398912. Its totient is φ = 867106704.

The previous prime is 2640420383. The next prime is 2640420403. The reversal of 2640420402 is 2040240462.

2640420402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2640420403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175543 + ... + 189989.

It is an arithmetic number, because the mean of its divisors is an integer number (167481216).

Almost surely, 2^2640420402 is an apocalyptic number.

2640420402 is an abundant number, since it is smaller than the sum of its proper divisors (2718978510).

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

2640420402 is a wasteful number, since it uses less digits than its factorization.

2640420402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14902.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 2640420402 is about 51385.0211832203. The cubic root of 2640420402 is about 1382.1580046273.

Adding to 2640420402 its reverse (2040240462), we get a palindrome (4680660864).

The spelling of 2640420402 in words is "two billion, six hundred forty million, four hundred twenty thousand, four hundred two".