2168672840 has 32 divisors (see below), whose sum is σ = 4881444480. Its totient is φ = 867125952.

The previous prime is 2168672839. The next prime is 2168672927. The reversal of 2168672840 is 482768612.

It is a junction number, because it is equal to n+sod(n) for n = 2168672791 and 2168672800.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107819 + ... + 126341.

It is an arithmetic number, because the mean of its divisors is an integer number (152545140).

Almost surely, 2^2168672840 is an apocalyptic number.

2168672840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2168672840 is an abundant number, since it is smaller than the sum of its proper divisors (2712771640).

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

2168672840 is a wasteful number, since it uses less digits than its factorization.

2168672840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21461 (or 21457 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 2168672840 is about 46569.0115849585. The cubic root of 2168672840 is about 1294.3886024336.

The spelling of 2168672840 in words is "two billion, one hundred sixty-eight million, six hundred seventy-two thousand, eight hundred forty".