6442479040 has 56 divisors (see below), whose sum is σ = 15601218480. Its totient is φ = 2533306368.

The previous prime is 6442479031. The next prime is 6442479049. The reversal of 6442479040 is 409742446.

It is an interprime number because it is at equal distance from previous prime (6442479031) and next prime (6442479049).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 6442478984 and 6442479002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6442479049) 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, 151737 + ... + 189496.

Almost surely, 2^6442479040 is an apocalyptic number.

It is an amenable number.

6442479040 is an abundant number, since it is smaller than the sum of its proper divisors (9158739440).

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

6442479040 is a wasteful number, since it uses less digits than its factorization.

6442479040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341309 (or 341299 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 40.

The square root of 6442479040 is about 80265.0549118357. The cubic root of 6442479040 is about 1860.7341919849.

The spelling of 6442479040 in words is "six billion, four hundred forty-two million, four hundred seventy-nine thousand, forty".