400550 has 12 divisors (see below), whose sum is σ = 745116. Its totient is φ = 160200.

The previous prime is 400523. The next prime is 400559. The reversal of 400550 is 55004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400559) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3956 + ... + 4055.

It is an arithmetic number, because the mean of its divisors is an integer number (62093).

2⁴⁰⁰⁵⁵⁰ is an apocalyptic number.

400550 is a deficient number, since it is larger than the sum of its proper divisors (344566).

400550 is a wasteful number, since it uses less digits than its factorization.

400550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8023 (or 8018 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 14.

The square root of 400550 is about 632.8901958476. The cubic root of 400550 is about 73.7143847953.

Adding to 400550 its reverse (55004), we get a palindrome (455554).

The spelling of 400550 in words is "four hundred thousand, five hundred fifty".