1233428109 has 16 divisors (see below), whose sum is σ = 1670328000. Its totient is φ = 809505536.

The previous prime is 1233428101. The next prime is 1233428123. The reversal of 1233428109 is 9018243321.

It is a cyclic number.

It is not a de Polignac number, because 1233428109 - 2³ = 1233428101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1233428109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1233428101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38302 + ... + 62720.

It is an arithmetic number, because the mean of its divisors is an integer number (104395500).

Almost surely, 2^1233428109 is an apocalyptic number.

It is an amenable number.

1233428109 is a deficient number, since it is larger than the sum of its proper divisors (436899891).

1233428109 is a wasteful number, since it uses less digits than its factorization.

1233428109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24684.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 1233428109 is about 35120.1951731479. The cubic root of 1233428109 is about 1072.4357440544.

The spelling of 1233428109 in words is "one billion, two hundred thirty-three million, four hundred twenty-eight thousand, one hundred nine".