400548 has 24 divisors (see below), whose sum is σ = 967680. Its totient is φ = 128800.

The previous prime is 400523. The next prime is 400559. The reversal of 400548 is 845004.

It is a congruent number.

It is an unprimeable number.

400548 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 in 7 ways as a sum of consecutive naturals, for example, 228 + ... + 923.

It is an arithmetic number, because the mean of its divisors is an integer number (40320).

2⁴⁰⁰⁵⁴⁸ is an apocalyptic number.

It is an amenable number.

400548 is an abundant number, since it is smaller than the sum of its proper divisors (567132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400548 is a wasteful number, since it uses less digits than its factorization.

400548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187 (or 1185 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 400548 is about 632.8886157927. Note that the first 3 decimals coincide. The cubic root of 400548 is about 73.7142621065.

The spelling of 400548 in words is "four hundred thousand, five hundred forty-eight".