2130309978 has 16 divisors (see below), whose sum is σ = 4302805536. Its totient is φ = 703072400.

The previous prime is 2130309977. The next prime is 2130309989. The reversal of 2130309978 is 8799030312.

It is not an unprimeable number, because it can be changed into a prime (2130309977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1757076 + ... + 1758287.

It is an arithmetic number, because the mean of its divisors is an integer number (268925346).

Almost surely, 2^2130309978 is an apocalyptic number.

2130309978 is an abundant number, since it is smaller than the sum of its proper divisors (2172495558).

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

2130309978 is a wasteful number, since it uses less digits than its factorization.

2130309978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3515469.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 2130309978 is about 46155.2811496149. The cubic root of 2130309978 is about 1286.7107633265.

The spelling of 2130309978 in words is "two billion, one hundred thirty million, three hundred nine thousand, nine hundred seventy-eight".