428973111 has 16 divisors (see below), whose sum is σ = 726304000. Its totient is φ = 245127384.

The previous prime is 428973101. The next prime is 428973137. The reversal of 428973111 is 111379824.

It is a happy number.

It is not a de Polignac number, because 428973111 - 2¹⁷ = 428842039 is a prime.

It is a super-2 number, since 2×428973111² = 368035859922036642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428973101) 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, 1134661 + ... + 1135038.

It is an arithmetic number, because the mean of its divisors is an integer number (45394000).

Almost surely, 2^428973111 is an apocalyptic number.

428973111 is a deficient number, since it is larger than the sum of its proper divisors (297330889).

428973111 is a wasteful number, since it uses less digits than its factorization.

428973111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2269715 (or 2269709 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 428973111 is about 20711.6660604597. Note that the first 3 decimals coincide. The cubic root of 428973111 is about 754.1829155859.

The spelling of 428973111 in words is "four hundred twenty-eight million, nine hundred seventy-three thousand, one hundred eleven".