731490 has 32 divisors (see below), whose sum is σ = 1805760. Its totient is φ = 189504.

The previous prime is 731483. The next prime is 731501. The reversal of 731490 is 94137.

It is a self number, because there is not a number n which added to its sum of digits gives 731490.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 781 + ... + 1439.

It is an arithmetic number, because the mean of its divisors is an integer number (56430).

2⁷³¹⁴⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 731490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (902880).

731490 is an abundant number, since it is smaller than the sum of its proper divisors (1074270).

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

731490 is a wasteful number, since it uses less digits than its factorization.

731490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706.

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

The square root of 731490 is about 855.2718865951. The cubic root of 731490 is about 90.1023526909.

It can be divided in two parts, 731 and 490, that added together give a palindrome (1221).

The spelling of 731490 in words is "seven hundred thirty-one thousand, four hundred ninety".