400616 has 8 divisors (see below), whose sum is σ = 751170. Its totient is φ = 200304.

The previous prime is 400607. The next prime is 400619. The reversal of 400616 is 616004.

It can be written as a sum of positive squares in only one way, i.e., 280900 + 119716 = 530^2 + 346^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 400594 and 400603.

It is not an unprimeable number, because it can be changed into a prime (400619) by changing a digit.

400616 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, 25031 + ... + 25046.

2⁴⁰⁰⁶¹⁶ is an apocalyptic number.

It is an amenable number.

400616 is a deficient number, since it is larger than the sum of its proper divisors (350554).

400616 is a wasteful number, since it uses less digits than its factorization.

400616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50083 (or 50079 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 400616 is about 632.9423354461. The cubic root of 400616 is about 73.7184332971.

The spelling of 400616 in words is "four hundred thousand, six hundred sixteen".