402243841 has 4 divisors (see below), whose sum is σ = 402321712. Its totient is φ = 402165972.

The previous prime is 402243839. The next prime is 402243869. The reversal of 402243841 is 148342204.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 402243841 - 2¹ = 402243839 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402243041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30591 + ... + 41716.

It is an arithmetic number, because the mean of its divisors is an integer number (100580428).

Almost surely, 2^402243841 is an apocalyptic number.

It is an amenable number.

402243841 is a deficient number, since it is larger than the sum of its proper divisors (77871).

402243841 is an equidigital number, since it uses as much as digits as its factorization.

402243841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77870.

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 402243841 is about 20056.0175757801. The cubic root of 402243841 is about 738.1814617075.

The spelling of 402243841 in words is "four hundred two million, two hundred forty-three thousand, eight hundred forty-one".