400716 has 18 divisors (see below), whose sum is σ = 1013012. Its totient is φ = 133560.

The previous prime is 400711. The next prime is 400721. The reversal of 400716 is 617004.

It is an interprime number because it is at equal distance from previous prime (400711) and next prime (400721).

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (400711) by changing a digit.

400716 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 5 ways as a sum of consecutive naturals, for example, 5530 + ... + 5601.

2⁴⁰⁰⁷¹⁶ is an apocalyptic number.

It is an amenable number.

400716 is an abundant number, since it is smaller than the sum of its proper divisors (612296).

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

400716 is a wasteful number, since it uses less digits than its factorization.

400716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11141 (or 11136 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 400716 is about 633.0213266550. The cubic root of 400716 is about 73.7245665436.

The spelling of 400716 in words is "four hundred thousand, seven hundred sixteen".