6442450940 has 48 divisors (see below), whose sum is σ = 13686128064. Its totient is φ = 2547148800.

The previous prime is 6442450939. The next prime is 6442450967. The reversal of 6442450940 is 490542446.

It is a super-2 number, since 2×6442450940² = 83010348228613767200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 6442450894 and 6442450903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1998530 + ... + 2001750.

It is an arithmetic number, because the mean of its divisors is an integer number (285127668).

Almost surely, 2^6442450940 is an apocalyptic number.

It is an amenable number.

6442450940 is an abundant number, since it is smaller than the sum of its proper divisors (7243677124).

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

6442450940 is a wasteful number, since it uses less digits than its factorization.

6442450940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4358 (or 4356 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

The square root of 6442450940 is about 80264.8798666017. The cubic root of 6442450940 is about 1860.7314866750.

The spelling of 6442450940 in words is "six billion, four hundred forty-two million, four hundred fifty thousand, nine hundred forty".