228400507 has 2 divisors, whose sum is σ = 228400508. Its totient is φ = 228400506.

The previous prime is 228400493. The next prime is 228400541. The reversal of 228400507 is 705004822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228400507 - 2¹¹ = 228398459 is a prime.

It is not a weakly prime, because it can be changed into another prime (228400547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114200253 + 114200254.

It is an arithmetic number, because the mean of its divisors is an integer number (114200254).

Almost surely, 2^228400507 is an apocalyptic number.

228400507 is a deficient number, since it is larger than the sum of its proper divisors (1).

228400507 is an equidigital number, since it uses as much as digits as its factorization.

228400507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 228400507 is about 15112.9251635810. The cubic root of 228400507 is about 611.2689761772.

The spelling of 228400507 in words is "two hundred twenty-eight million, four hundred thousand, five hundred seven".