731442642 has 64 divisors (see below), whose sum is σ = 1785231360. Its totient is φ = 195237504.

The previous prime is 731442617. The next prime is 731442653. The reversal of 731442642 is 246244137.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32734 + ... + 50342.

It is an arithmetic number, because the mean of its divisors is an integer number (27894240).

Almost surely, 2^731442642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 731442642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (892615680).

731442642 is an abundant number, since it is smaller than the sum of its proper divisors (1053788718).

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

731442642 is a wasteful number, since it uses less digits than its factorization.

731442642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17687.

The product of its digits is 32256, while the sum is 33.

The square root of 731442642 is about 27045.1962832589. The cubic root of 731442642 is about 901.0040818521.

Adding to 731442642 its reverse (246244137), we get a palindrome (977686779).

The spelling of 731442642 in words is "seven hundred thirty-one million, four hundred forty-two thousand, six hundred forty-two".