720090324 has 30 divisors (see below), whose sum is σ = 1882459194. Its totient is φ = 240030000.

The previous prime is 720090317. The next prime is 720090331. The reversal of 720090324 is 423090027.

It is an interprime number because it is at equal distance from previous prime (720090317) and next prime (720090331).

It can be written as a sum of positive squares in only one way, i.e., 719312400 + 777924 = 26820^2 + 882^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1110927 + ... + 1111574.

Almost surely, 2^720090324 is an apocalyptic number.

It is an amenable number.

720090324 is an abundant number, since it is smaller than the sum of its proper divisors (1162368870).

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

720090324 is a wasteful number, since it uses less digits than its factorization.

720090324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222517 (or 2222506 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 720090324 is about 26834.4987655816. The cubic root of 720090324 is about 896.3184272260.

The spelling of 720090324 in words is "seven hundred twenty million, ninety thousand, three hundred twenty-four".