428181111 has 6 divisors (see below), whose sum is σ = 618483840. Its totient is φ = 285454068.

The previous prime is 428181101. The next prime is 428181119. The reversal of 428181111 is 111181824.

It is not a de Polignac number, because 428181111 - 2¹⁴ = 428164727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428181119) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23787831 + ... + 23787848.

It is an arithmetic number, because the mean of its divisors is an integer number (103080640).

Almost surely, 2^428181111 is an apocalyptic number.

428181111 is a deficient number, since it is larger than the sum of its proper divisors (190302729).

428181111 is a wasteful number, since it uses less digits than its factorization.

428181111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47575685 (or 47575682 counting only the distinct ones).

The product of its digits is 512, while the sum is 27.

The square root of 428181111 is about 20692.5375679253. The cubic root of 428181111 is about 753.7184879939.

The spelling of 428181111 in words is "four hundred twenty-eight million, one hundred eighty-one thousand, one hundred eleven".