724215492 has 540 divisors, whose sum is σ = 2696864940. Its totient is φ = 167650560.

The previous prime is 724215491. The next prime is 724215497. The reversal of 724215492 is 294512427.

724215492 is a `hidden beast` number, since 72 + 42 + 1 + 549 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 232440516 + 491774976 = 15246^2 + 22176^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (724215491) by changing a digit.

It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 24972934 + ... + 24972962.

Almost surely, 2^724215492 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 724215492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1348432470).

724215492 is an abundant number, since it is smaller than the sum of its proper divisors (1972649448).

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

724215492 is a wasteful number, since it uses less digits than its factorization.

724215492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 65 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 724215492 is about 26911.2521447814. The cubic root of 724215492 is about 898.0267434492.

The spelling of 724215492 in words is "seven hundred twenty-four million, two hundred fifteen thousand, four hundred ninety-two".