428293233 has 12 divisors (see below), whose sum is σ = 618878260. Its totient is φ = 285421536.

The previous prime is 428293219. The next prime is 428293247. The reversal of 428293233 is 332392824.

It is an interprime number because it is at equal distance from previous prime (428293219) and next prime (428293247).

It can be written as a sum of positive squares in 2 ways, for example, as 290770704 + 137522529 = 17052^2 + 11727^2 .

It is not a de Polignac number, because 428293233 - 2⁹ = 428292721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428293273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21963 + ... + 36591.

Almost surely, 2^428293233 is an apocalyptic number.

It is an amenable number.

428293233 is a deficient number, since it is larger than the sum of its proper divisors (190585027).

428293233 is a wasteful number, since it uses less digits than its factorization.

428293233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17888 (or 17885 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 428293233 is about 20695.2466281511. The cubic root of 428293233 is about 753.7842709433.

The spelling of 428293233 in words is "four hundred twenty-eight million, two hundred ninety-three thousand, two hundred thirty-three".