2109023428 has 6 divisors (see below), whose sum is σ = 3690791006. Its totient is φ = 1054511712.

The previous prime is 2109023377. The next prime is 2109023429. The reversal of 2109023428 is 8243209012.

It can be written as a sum of positive squares in only one way, i.e., 1395171904 + 713851524 = 37352^2 + 26718^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2109023428.

It is not an unprimeable number, because it can be changed into a prime (2109023429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 263627925 + ... + 263627932.

Almost surely, 2^2109023428 is an apocalyptic number.

It is an amenable number.

2109023428 is a deficient number, since it is larger than the sum of its proper divisors (1581767578).

2109023428 is a wasteful number, since it uses less digits than its factorization.

2109023428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527255861 (or 527255859 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 2109023428 is about 45924.1050865447. The cubic root of 2109023428 is about 1282.4107051256.

The spelling of 2109023428 in words is "two billion, one hundred nine million, twenty-three thousand, four hundred twenty-eight".