428293507 has 2 divisors, whose sum is σ = 428293508. Its totient is φ = 428293506.

The previous prime is 428293493. The next prime is 428293553. The reversal of 428293507 is 705392824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 428293507 - 2²³ = 419904899 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 428293507.

It is not a weakly prime, because it can be changed into another prime (428293807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214146753 + 214146754.

It is an arithmetic number, because the mean of its divisors is an integer number (214146754).

Almost surely, 2^428293507 is an apocalyptic number.

428293507 is a deficient number, since it is larger than the sum of its proper divisors (1).

428293507 is an equidigital number, since it uses as much as digits as its factorization.

428293507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 428293507 is about 20695.2532480277. The cubic root of 428293507 is about 753.7844316874.

The spelling of 428293507 in words is "four hundred twenty-eight million, two hundred ninety-three thousand, five hundred seven".