731616 has 24 divisors (see below), whose sum is σ = 1920744. Its totient is φ = 243840.

The previous prime is 731611. The next prime is 731623. The reversal of 731616 is 616137.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731611) by changing a digit.

731616 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 3 ways as a sum of consecutive naturals, for example, 3715 + ... + 3906.

It is an arithmetic number, because the mean of its divisors is an integer number (80031).

2⁷³¹⁶¹⁶ is an apocalyptic number.

It is an amenable number.

731616 is an abundant number, since it is smaller than the sum of its proper divisors (1189128).

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

731616 is a wasteful number, since it uses less digits than its factorization.

731616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7634 (or 7626 counting only the distinct ones).

The product of its digits is 756, while the sum is 24.

The square root of 731616 is about 855.3455442101. The cubic root of 731616 is about 90.1075258054.

The spelling of 731616 in words is "seven hundred thirty-one thousand, six hundred sixteen".