720562490 has 16 divisors (see below), whose sum is σ = 1305276552. Its totient is φ = 286388544.

The previous prime is 720562471. The next prime is 720562511. The reversal of 720562490 is 94265027.

It can be written as a sum of positive squares in 4 ways, for example, as 510805201 + 209757289 = 22601^2 + 14483^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 720562490.

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 7 ways as a sum of consecutive naturals, for example, 227909 + ... + 231048.

Almost surely, 2^720562490 is an apocalyptic number.

720562490 is a deficient number, since it is larger than the sum of its proper divisors (584714062).

720562490 is a wasteful number, since it uses less digits than its factorization.

720562490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459121.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 720562490 is about 26843.2950659937. The cubic root of 720562490 is about 896.5142909048.

The spelling of 720562490 in words is "seven hundred twenty million, five hundred sixty-two thousand, four hundred ninety".