2129672740 has 24 divisors (see below), whose sum is σ = 4816337400. Its totient is φ = 786340608.

The previous prime is 2129672719. The next prime is 2129672801. The reversal of 2129672740 is 472769212.

It can be written as a sum of positive squares in 4 ways, for example, as 457189924 + 1672482816 = 21382^2 + 40896^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2129672693 and 2129672702.

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, 4095265 + ... + 4095784.

It is an arithmetic number, because the mean of its divisors is an integer number (200680725).

Almost surely, 2^2129672740 is an apocalyptic number.

2129672740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2129672740 is an abundant number, since it is smaller than the sum of its proper divisors (2686664660).

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

2129672740 is a wasteful number, since it uses less digits than its factorization.

2129672740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8191071 (or 8191069 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 2129672740 is about 46148.3774362653. The cubic root of 2129672740 is about 1286.5824529286.

The spelling of 2129672740 in words is "two billion, one hundred twenty-nine million, six hundred seventy-two thousand, seven hundred forty".