802720538 has 8 divisors (see below), whose sum is σ = 1212870132. Its totient is φ = 398430496.

The previous prime is 802720489. The next prime is 802720543. The reversal of 802720538 is 835027208.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 675324169 + 127396369 = 25987^2 + 11287^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 802720498 and 802720507.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1464545 + ... + 1465092.

Almost surely, 2^802720538 is an apocalyptic number.

802720538 is a deficient number, since it is larger than the sum of its proper divisors (410149594).

802720538 is a wasteful number, since it uses less digits than its factorization.

802720538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2929776.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 802720538 is about 28332.3232016014. The cubic root of 802720538 is about 929.3688776936.

The spelling of 802720538 in words is "eight hundred two million, seven hundred twenty thousand, five hundred thirty-eight".