825690534 has 16 divisors (see below), whose sum is σ = 1656594288. Its totient is φ = 274361312.

The previous prime is 825690533. The next prime is 825690563. The reversal of 825690534 is 435096528.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825690533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215157 + ... + 218960.

It is an arithmetic number, because the mean of its divisors is an integer number (103537143).

Almost surely, 2^825690534 is an apocalyptic number.

825690534 is an abundant number, since it is smaller than the sum of its proper divisors (830903754).

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

825690534 is a wasteful number, since it uses less digits than its factorization.

825690534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434439.

The product of its (nonzero) digits is 259200, while the sum is 42.

The square root of 825690534 is about 28734.8313723954. The cubic root of 825690534 is about 938.1503290748.

It can be divided in two parts, 8256 and 90534, that added together give a triangular number (98790 = T₄₄₄).

The spelling of 825690534 in words is "eight hundred twenty-five million, six hundred ninety thousand, five hundred thirty-four".