428831109 has 24 divisors (see below), whose sum is σ = 721274112. Its totient is φ = 240420960.

The previous prime is 428831101. The next prime is 428831111. The reversal of 428831109 is 901138824.

It is not a de Polignac number, because 428831109 - 2³ = 428831101 is a prime.

It is a super-2 number, since 2×428831109² = 367792240092339762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428831101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60877 + ... + 67554.

It is an arithmetic number, because the mean of its divisors is an integer number (30053088).

Almost surely, 2^428831109 is an apocalyptic number.

It is an amenable number.

428831109 is a deficient number, since it is larger than the sum of its proper divisors (292443003).

428831109 is a wasteful number, since it uses less digits than its factorization.

428831109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128497 (or 128494 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 428831109 is about 20708.2377086994. The cubic root of 428831109 is about 754.0996879126.

The spelling of 428831109 in words is "four hundred twenty-eight million, eight hundred thirty-one thousand, one hundred nine".