724398426 has 12 divisors (see below), whose sum is σ = 1569529962. Its totient is φ = 241466136.

The previous prime is 724398419. The next prime is 724398431. The reversal of 724398426 is 624893427.

It can be written as a sum of positive squares in only one way, i.e., 571257801 + 153140625 = 23901^2 + 12375^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20122161 + ... + 20122196.

Almost surely, 2^724398426 is an apocalyptic number.

724398426 is an abundant number, since it is smaller than the sum of its proper divisors (845131536).

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

724398426 is a wasteful number, since it uses less digits than its factorization.

724398426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40244365 (or 40244362 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 724398426 is about 26914.6507686799. The cubic root of 724398426 is about 898.1023497643.

The spelling of 724398426 in words is "seven hundred twenty-four million, three hundred ninety-eight thousand, four hundred twenty-six".