720038869 has 4 divisors (see below), whose sum is σ = 785496960. Its totient is φ = 654580780.

The previous prime is 720038863. The next prime is 720038873. The reversal of 720038869 is 968830027.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 968830027 = 11 ⋅88075457.

It is a cyclic number.

It is not a de Polignac number, because 720038869 - 2⁹ = 720038357 is a prime.

It is a super-2 number, since 2×720038869² = 1036911945741598322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720038863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32729029 + ... + 32729050.

It is an arithmetic number, because the mean of its divisors is an integer number (196374240).

Almost surely, 2^720038869 is an apocalyptic number.

It is an amenable number.

720038869 is a deficient number, since it is larger than the sum of its proper divisors (65458091).

720038869 is a wasteful number, since it uses less digits than its factorization.

720038869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65458090.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 720038869 is about 26833.5400012745. The cubic root of 720038869 is about 896.2970775139.

The spelling of 720038869 in words is "seven hundred twenty million, thirty-eight thousand, eight hundred sixty-nine".