2130400044 has 36 divisors (see below), whose sum is σ = 5386726800. Its totient is φ = 709929120.

The previous prime is 2130400009. The next prime is 2130400081. The reversal of 2130400044 is 4400040312.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169282 + ... + 181430.

It is an arithmetic number, because the mean of its divisors is an integer number (149631300).

Almost surely, 2^2130400044 is an apocalyptic number.

It is an amenable number.

2130400044 is an abundant number, since it is smaller than the sum of its proper divisors (3256326756).

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

2130400044 is a wasteful number, since it uses less digits than its factorization.

2130400044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17030 (or 17025 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 2130400044 is about 46156.2568239670. The cubic root of 2130400044 is about 1286.7288964088.

Adding to 2130400044 its reverse (4400040312), we get a palindrome (6530440356).

The spelling of 2130400044 in words is "two billion, one hundred thirty million, four hundred thousand, forty-four".