820625782 has 16 divisors (see below), whose sum is σ = 1257008832. Its totient is φ = 401698440.

The previous prime is 820625779. The next prime is 820625791. The reversal of 820625782 is 287526028.

820625782 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×820625782² = 1346853348166223048, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3057 + ... + 40627.

It is an arithmetic number, because the mean of its divisors is an integer number (78563052).

Almost surely, 2^820625782 is an apocalyptic number.

820625782 is a deficient number, since it is larger than the sum of its proper divisors (436383050).

820625782 is a wasteful number, since it uses less digits than its factorization.

820625782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37803.

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 820625782 is about 28646.5666703708. The cubic root of 820625782 is about 936.2282016882.

The spelling of 820625782 in words is "eight hundred twenty million, six hundred twenty-five thousand, seven hundred eighty-two".