828566138 has 8 divisors (see below), whose sum is σ = 1243989588. Its totient is φ = 413902944.

The previous prime is 828566107. The next prime is 828566147. The reversal of 828566138 is 831665828.

It can be written as a sum of positive squares in 2 ways, for example, as 552109009 + 276457129 = 23497^2 + 16627^2 .

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 = 828566092 and 828566101.

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, 187331 + ... + 191702.

Almost surely, 2^828566138 is an apocalyptic number.

828566138 is a deficient number, since it is larger than the sum of its proper divisors (415423450).

828566138 is a wasteful number, since it uses less digits than its factorization.

828566138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380128.

The product of its digits is 552960, while the sum is 47.

The square root of 828566138 is about 28784.8247866823. The cubic root of 828566138 is about 939.2381551580.

The spelling of 828566138 in words is "eight hundred twenty-eight million, five hundred sixty-six thousand, one hundred thirty-eight".