400609802 has 8 divisors (see below), whose sum is σ = 601049700. Its totient is φ = 200259904.

The previous prime is 400609763. The next prime is 400609829. The reversal of 400609802 is 208906004.

It can be written as a sum of positive squares in 2 ways, for example, as 384199201 + 16410601 = 19601^2 + 4051^2 .

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

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 9977 + ... + 30012.

Almost surely, 2^400609802 is an apocalyptic number.

400609802 is a deficient number, since it is larger than the sum of its proper divisors (200439898).

400609802 is a wasteful number, since it uses less digits than its factorization.

400609802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45000.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 400609802 is about 20015.2392441360. The cubic root of 400609802 is about 737.1805312492.

The spelling of 400609802 in words is "four hundred million, six hundred nine thousand, eight hundred two".