402047000405 has 8 divisors (see below), whose sum is σ = 482755515192. Its totient is φ = 321438190528.

The previous prime is 402047000371. The next prime is 402047000437. The reversal of 402047000405 is 504000740204.

It can be written as a sum of positive squares in 4 ways, for example, as 66841897444 + 335205102961 = 258538^2 + 578969^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 402047000405 - 2⁸ = 402047000149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24917354 + ... + 24933483.

It is an arithmetic number, because the mean of its divisors is an integer number (60344439399).

Almost surely, 2^402047000405 is an apocalyptic number.

It is an amenable number.

402047000405 is a deficient number, since it is larger than the sum of its proper divisors (80708514787).

402047000405 is a wasteful number, since it uses less digits than its factorization.

402047000405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49852455.

The product of its (nonzero) digits is 4480, while the sum is 26.

Adding to 402047000405 its reverse (504000740204), we get a palindrome (906047740609).

The spelling of 402047000405 in words is "four hundred two billion, forty-seven million, four hundred five", and thus it is an aban number.