825399490 has 32 divisors (see below), whose sum is σ = 1536952320. Its totient is φ = 318820800.

The previous prime is 825399473. The next prime is 825399493. The reversal of 825399490 is 94993528.

It is not an unprimeable number, because it can be changed into a prime (825399493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155175 + ... + 160405.

It is an arithmetic number, because the mean of its divisors is an integer number (48029760).

Almost surely, 2^825399490 is an apocalyptic number.

825399490 is a deficient number, since it is larger than the sum of its proper divisors (711552830).

825399490 is a wasteful number, since it uses less digits than its factorization.

825399490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5778.

The product of its (nonzero) digits is 699840, while the sum is 49.

The square root of 825399490 is about 28729.7666193097. The cubic root of 825399490 is about 938.0400879693.

It can be divided in two parts, 82539 and 9490, that added together give a palindrome (92029).

The spelling of 825399490 in words is "eight hundred twenty-five million, three hundred ninety-nine thousand, four hundred ninety".