400654 has 8 divisors (see below), whose sum is σ = 605160. Its totient is φ = 198936.

The previous prime is 400651. The next prime is 400657. The reversal of 400654 is 456004.

It is an interprime number because it is at equal distance from previous prime (400651) and next prime (400657).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289 + ... + 940.

It is an arithmetic number, because the mean of its divisors is an integer number (75645).

2⁴⁰⁰⁶⁵⁴ is an apocalyptic number.

400654 is a deficient number, since it is larger than the sum of its proper divisors (204506).

400654 is a wasteful number, since it uses less digits than its factorization.

400654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 400654 is about 632.9723532667. The cubic root of 400654 is about 73.7207640510.

Adding to 400654 its reverse (456004), we get a palindrome (856658).

The spelling of 400654 in words is "four hundred thousand, six hundred fifty-four".