2143407864 has 64 divisors (see below), whose sum is σ = 5969728800. Its totient is φ = 636765696.

The previous prime is 2143407839. The next prime is 2143407883. The reversal of 2143407864 is 4687043412.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

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, 109399 + ... + 127494.

Almost surely, 2^2143407864 is an apocalyptic number.

2143407864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2143407864 is an abundant number, since it is smaller than the sum of its proper divisors (3826320936).

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

2143407864 is a wasteful number, since it uses less digits than its factorization.

2143407864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236944 (or 236940 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 39.

The square root of 2143407864 is about 46296.9530746895. The cubic root of 2143407864 is about 1289.3424255113.

The spelling of 2143407864 in words is "two billion, one hundred forty-three million, four hundred seven thousand, eight hundred sixty-four".