402806943 has 72 divisors (see below), whose sum is σ = 745434144. Its totient is φ = 205096320.

The previous prime is 402806933. The next prime is 402806947. The reversal of 402806943 is 349608204.

It is a happy number.

It is not a de Polignac number, because 402806943 - 2⁶ = 402806879 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 402806898 and 402806907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402806947) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 403521 + ... + 404517.

It is an arithmetic number, because the mean of its divisors is an integer number (10353252).

Almost surely, 2^402806943 is an apocalyptic number.

402806943 is a deficient number, since it is larger than the sum of its proper divisors (342627201).

402806943 is a wasteful number, since it uses less digits than its factorization.

402806943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085 (or 1071 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 402806943 is about 20070.0508967965. The cubic root of 402806943 is about 738.5257616896.

The spelling of 402806943 in words is "four hundred two million, eight hundred six thousand, nine hundred forty-three".