526978836 has 72 divisors (see below), whose sum is σ = 1381915080. Its totient is φ = 169123584.

The previous prime is 526978819. The next prime is 526978843. The reversal of 526978836 is 638879625.

It is a happy number.

526978836 is a `hidden beast` number, since 526 + 9 + 7 + 88 + 36 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 900 + 526977936 = 30^2 + 22956^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 681346 + ... + 682118.

It is an arithmetic number, because the mean of its divisors is an integer number (19193265).

Almost surely, 2^526978836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 526978836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (690957540).

526978836 is an abundant number, since it is smaller than the sum of its proper divisors (854936244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

526978836 is a wasteful number, since it uses less digits than its factorization.

526978836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465 (or 1460 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 526978836 is about 22956.0196027099. The cubic root of 526978836 is about 807.7266111815.

The spelling of 526978836 in words is "five hundred twenty-six million, nine hundred seventy-eight thousand, eight hundred thirty-six".