6220642440 has 64 divisors (see below), whose sum is σ = 18917596800. Its totient is φ = 1636111872.

The previous prime is 6220642387. The next prime is 6220642457. The reversal of 6220642440 is 442460226.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 6220642398 and 6220642407.

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, 346300 + ... + 363819.

It is an arithmetic number, because the mean of its divisors is an integer number (295587450).

Almost surely, 2^6220642440 is an apocalyptic number.

6220642440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6220642440 is an abundant number, since it is smaller than the sum of its proper divisors (12696954360).

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

6220642440 is a wasteful number, since it uses less digits than its factorization.

6220642440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710206 (or 710202 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

The square root of 6220642440 is about 78871.0494414776. The cubic root of 6220642440 is about 1839.1271103868.

The spelling of 6220642440 in words is "six billion, two hundred twenty million, six hundred forty-two thousand, four hundred forty".