724578340 has 24 divisors (see below), whose sum is σ = 1574085240. Its totient is φ = 279836928.

The previous prime is 724578293. The next prime is 724578377. The reversal of 724578340 is 43875427.

It can be written as a sum of positive squares in 4 ways, for example, as 227466724 + 497111616 = 15082^2 + 22296^2 .

It is a junction number, because it is equal to n+sod(n) for n = 724578293 and 724578302.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 624057 + ... + 625216.

It is an arithmetic number, because the mean of its divisors is an integer number (65586885).

Almost surely, 2^724578340 is an apocalyptic number.

It is an amenable number.

724578340 is an abundant number, since it is smaller than the sum of its proper divisors (849506900).

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

724578340 is a wasteful number, since it uses less digits than its factorization.

724578340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249311 (or 1249309 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 40.

The square root of 724578340 is about 26917.9928672254. The cubic root of 724578340 is about 898.1766955043.

The spelling of 724578340 in words is "seven hundred twenty-four million, five hundred seventy-eight thousand, three hundred forty".