2647907820 has 72 divisors (see below), whose sum is σ = 8329483344. Its totient is φ = 706107456.

The previous prime is 2647907807. The next prime is 2647907827. The reversal of 2647907820 is 287097462.

It is a super-2 number, since 2×2647907820² = 14022831646434304800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (2647907827) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 267559 + ... + 277278.

Almost surely, 2^2647907820 is an apocalyptic number.

2647907820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2647907820 is an abundant number, since it is smaller than the sum of its proper divisors (5681575524).

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

2647907820 is a wasteful number, since it uses less digits than its factorization.

2647907820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544861 (or 544847 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 2647907820 is about 51457.8256439193. The cubic root of 2647907820 is about 1383.4632296209.

The spelling of 2647907820 in words is "two billion, six hundred forty-seven million, nine hundred seven thousand, eight hundred twenty".