731878224 has 160 divisors (see below), whose sum is σ = 2391275520. Its totient is φ = 187353600.

The previous prime is 731878223. The next prime is 731878247. The reversal of 731878224 is 422878137.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731878223) 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, 261022 + ... + 263810.

It is an arithmetic number, because the mean of its divisors is an integer number (14945472).

Almost surely, 2^731878224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 731878224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1195637760).

731878224 is an abundant number, since it is smaller than the sum of its proper divisors (1659397296).

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

731878224 is a wasteful number, since it uses less digits than its factorization.

731878224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2889 (or 2883 counting only the distinct ones).

The product of its digits is 150528, while the sum is 42.

The square root of 731878224 is about 27053.2479380942. The cubic root of 731878224 is about 901.1828989178.

The spelling of 731878224 in words is "seven hundred thirty-one million, eight hundred seventy-eight thousand, two hundred twenty-four".