400802 has 4 divisors (see below), whose sum is σ = 601206. Its totient is φ = 200400.

The previous prime is 400759. The next prime is 400823. The reversal of 400802 is 208004.

400802 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 361201 + 39601 = 601^2 + 199^2 .

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

400802 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100199 + ... + 100202.

2⁴⁰⁰⁸⁰² is an apocalyptic number.

400802 is a deficient number, since it is larger than the sum of its proper divisors (200404).

400802 is a wasteful number, since it uses less digits than its factorization.

400802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200403.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 400802 is about 633.0892512119. The cubic root of 400802 is about 73.7298403196.

Adding to 400802 its reverse (208004), we get a palindrome (608806).

The spelling of 400802 in words is "four hundred thousand, eight hundred two".