720409064 has 8 divisors (see below), whose sum is σ = 1350767010. Its totient is φ = 360204528.

The previous prime is 720409049. The next prime is 720409121. The reversal of 720409064 is 460904027.

It can be written as a sum of positive squares in only one way, i.e., 707028100 + 13380964 = 26590^2 + 3658^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 720409064.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45025559 + ... + 45025574.

Almost surely, 2^720409064 is an apocalyptic number.

It is an amenable number.

720409064 is a deficient number, since it is larger than the sum of its proper divisors (630357946).

720409064 is a wasteful number, since it uses less digits than its factorization.

720409064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90051139 (or 90051135 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 720409064 is about 26840.4371052336. The cubic root of 720409064 is about 896.4506561902.

The spelling of 720409064 in words is "seven hundred twenty million, four hundred nine thousand, sixty-four".