825540078 has 64 divisors (see below), whose sum is σ = 1872605952. Its totient is φ = 240410880.

The previous prime is 825540049. The next prime is 825540083. The reversal of 825540078 is 870045528.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 200650 + ... + 204722.

It is an arithmetic number, because the mean of its divisors is an integer number (29259468).

Almost surely, 2^825540078 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 825540078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (936302976).

825540078 is an abundant number, since it is smaller than the sum of its proper divisors (1047065874).

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

825540078 is a wasteful number, since it uses less digits than its factorization.

825540078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4209.

The product of its (nonzero) digits is 89600, while the sum is 39.

The square root of 825540078 is about 28732.2132457630. The cubic root of 825540078 is about 938.0933428657.

The spelling of 825540078 in words is "eight hundred twenty-five million, five hundred forty thousand, seventy-eight".