402288823 has 2 divisors, whose sum is σ = 402288824. Its totient is φ = 402288822.

The previous prime is 402288787. The next prime is 402288857. The reversal of 402288823 is 328882204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402288823 - 2¹⁷ = 402157751 is a prime.

It is a super-2 number, since 2×402288823² = 323672594221450658, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402288223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201144411 + 201144412.

It is an arithmetic number, because the mean of its divisors is an integer number (201144412).

Almost surely, 2^402288823 is an apocalyptic number.

402288823 is a deficient number, since it is larger than the sum of its proper divisors (1).

402288823 is an equidigital number, since it uses as much as digits as its factorization.

402288823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49152, while the sum is 37.

The square root of 402288823 is about 20057.1389534998. The cubic root of 402288823 is about 738.2089770580.

The spelling of 402288823 in words is "four hundred two million, two hundred eighty-eight thousand, eight hundred twenty-three".