402400841 has 4 divisors (see below), whose sum is σ = 402471300. Its totient is φ = 402330384.

The previous prime is 402400787. The next prime is 402400853. The reversal of 402400841 is 148004204.

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

It can be written as a sum of positive squares in 2 ways, for example, as 200647225 + 201753616 = 14165^2 + 14204^2 .

It is a cyclic number.

It is not a de Polignac number, because 402400841 - 2¹⁰ = 402399817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402400441) 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, 25826 + ... + 38363.

It is an arithmetic number, because the mean of its divisors is an integer number (100617825).

Almost surely, 2^402400841 is an apocalyptic number.

It is an amenable number.

402400841 is a deficient number, since it is larger than the sum of its proper divisors (70459).

402400841 is an equidigital number, since it uses as much as digits as its factorization.

402400841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70458.

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 402400841 is about 20059.9312311882. The cubic root of 402400841 is about 738.2774892101.

The spelling of 402400841 in words is "four hundred two million, four hundred thousand, eight hundred forty-one".