402266905 has 4 divisors (see below), whose sum is σ = 482720292. Its totient is φ = 321813520.

The previous prime is 402266863. The next prime is 402266911. The reversal of 402266905 is 509662204.

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 194993296 + 207273609 = 13964^2 + 14397^2 .

It is not a de Polignac number, because 402266905 - 2¹¹ = 402264857 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40226686 + ... + 40226695.

It is an arithmetic number, because the mean of its divisors is an integer number (120680073).

Almost surely, 2^402266905 is an apocalyptic number.

It is an amenable number.

402266905 is a deficient number, since it is larger than the sum of its proper divisors (80453387).

402266905 is an equidigital number, since it uses as much as digits as its factorization.

402266905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80453386.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 402266905 is about 20056.5925570621. The cubic root of 402266905 is about 738.1955701413.

The spelling of 402266905 in words is "four hundred two million, two hundred sixty-six thousand, nine hundred five".