428293807 has 2 divisors, whose sum is σ = 428293808. Its totient is φ = 428293806.

The previous prime is 428293793. The next prime is 428293813. The reversal of 428293807 is 708392824.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428293807 is a prime.

It is a super-2 number, since 2×428293807² = 366871170229106498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428293867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214146903 + 214146904.

It is an arithmetic number, because the mean of its divisors is an integer number (214146904).

Almost surely, 2^428293807 is an apocalyptic number.

428293807 is a deficient number, since it is larger than the sum of its proper divisors (1).

428293807 is an equidigital number, since it uses as much as digits as its factorization.

428293807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 428293807 is about 20695.2604960653. The cubic root of 428293807 is about 753.7846076845.

It can be divided in two parts, 4282 and 93807, that added together give a palindrome (98089).

The spelling of 428293807 in words is "four hundred twenty-eight million, two hundred ninety-three thousand, eight hundred seven".