405867494 has 4 divisors (see below), whose sum is σ = 608801244. Its totient is φ = 202933746.

The previous prime is 405867491. The next prime is 405867521. The reversal of 405867494 is 494768504.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405867491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101466872 + ... + 101466875.

It is an arithmetic number, because the mean of its divisors is an integer number (152200311).

Almost surely, 2^405867494 is an apocalyptic number.

405867494 is a deficient number, since it is larger than the sum of its proper divisors (202933750).

405867494 is a wasteful number, since it uses less digits than its factorization.

405867494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202933749.

The product of its (nonzero) digits is 967680, while the sum is 47.

The square root of 405867494 is about 20146.1533301025. The cubic root of 405867494 is about 740.3914984650.

The spelling of 405867494 in words is "four hundred five million, eight hundred sixty-seven thousand, four hundred ninety-four".