400766 has 4 divisors (see below), whose sum is σ = 601152. Its totient is φ = 200382.

The previous prime is 400759. The next prime is 400823. The reversal of 400766 is 667004.

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

It is a super-2 number, since 2×400766² = 321226773512, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

400766 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, 100190 + ... + 100193.

It is an arithmetic number, because the mean of its divisors is an integer number (150288).

2⁴⁰⁰⁷⁶⁶ is an apocalyptic number.

400766 is a deficient number, since it is larger than the sum of its proper divisors (200386).

400766 is a wasteful number, since it uses less digits than its factorization.

400766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200385.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 400766 is about 633.0608185633. The cubic root of 400766 is about 73.7276327842.

It can be divided in two parts, 4007 and 66, that multiplied together give a palindrome (264462).

The spelling of 400766 in words is "four hundred thousand, seven hundred sixty-six".