402887623 has 4 divisors (see below), whose sum is σ = 403235208. Its totient is φ = 402540040.

The previous prime is 402887593. The next prime is 402887627. The reversal of 402887623 is 326788204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402887623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402887627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172048 + ... + 174373.

It is an arithmetic number, because the mean of its divisors is an integer number (100808802).

Almost surely, 2^402887623 is an apocalyptic number.

402887623 is a deficient number, since it is larger than the sum of its proper divisors (347585).

402887623 is a wasteful number, since it uses less digits than its factorization.

402887623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347584.

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 402887623 is about 20072.0607561854. The cubic root of 402887623 is about 738.5750659380.

The spelling of 402887623 in words is "four hundred two million, eight hundred eighty-seven thousand, six hundred twenty-three".