731234420 has 96 divisors (see below), whose sum is σ = 1824076800. Its totient is φ = 240920064.

The previous prime is 731234411. The next prime is 731234429. The reversal of 731234420 is 24432137.

It is an interprime number because it is at equal distance from previous prime (731234411) and next prime (731234429).

It is a self number, because there is not a number n which added to its sum of digits gives 731234420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731234429) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1579109 + ... + 1579571.

It is an arithmetic number, because the mean of its divisors is an integer number (19000800).

Almost surely, 2^731234420 is an apocalyptic number.

731234420 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 731234420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (912038400).

731234420 is an abundant number, since it is smaller than the sum of its proper divisors (1092842380).

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

731234420 is a wasteful number, since it uses less digits than its factorization.

731234420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897 (or 895 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 731234420 is about 27041.3464901436. The cubic root of 731234420 is about 900.9185765478.

Adding to 731234420 its reverse (24432137), we get a palindrome (755666557).

The spelling of 731234420 in words is "seven hundred thirty-one million, two hundred thirty-four thousand, four hundred twenty".