6246640440 has 96 divisors (see below), whose sum is σ = 20850317280. Its totient is φ = 1620746496.

The previous prime is 6246640417. The next prime is 6246640451. The reversal of 6246640440 is 440466426.

It is a happy number.

6246640440 is a `hidden beast` number, since 6 + 2 + 4 + 6 + 640 + 4 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 6246640395 and 6246640404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 221164 + ... + 247803.

It is an arithmetic number, because the mean of its divisors is an integer number (217190805).

Almost surely, 2^6246640440 is an apocalyptic number.

6246640440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6246640440 is an abundant number, since it is smaller than the sum of its proper divisors (14603676840).

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

6246640440 is a wasteful number, since it uses less digits than its factorization.

6246640440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469021 (or 469014 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

The square root of 6246640440 is about 79035.6909250498. The cubic root of 6246640440 is about 1841.6856441697.

The spelling of 6246640440 in words is "six billion, two hundred forty-six million, six hundred forty thousand, four hundred forty".