720828479 has 16 divisors (see below), whose sum is σ = 887335680. Its totient is φ = 571717440.

The previous prime is 720828467. The next prime is 720828481. The reversal of 720828479 is 974828027.

It is a happy number.

It is not a de Polignac number, because 720828479 - 2⁸ = 720828223 is a prime.

It is a super-2 number, since 2×720828479² = 1039187392274906882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720828179) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57302 + ... + 68739.

It is an arithmetic number, because the mean of its divisors is an integer number (55458480).

Almost surely, 2^720828479 is an apocalyptic number.

720828479 is a deficient number, since it is larger than the sum of its proper divisors (166507201).

720828479 is a wasteful number, since it uses less digits than its factorization.

720828479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126110.

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 720828479 is about 26848.2490862998. The cubic root of 720828479 is about 896.6245906622.

The spelling of 720828479 in words is "seven hundred twenty million, eight hundred twenty-eight thousand, four hundred seventy-nine".