820149872 has 10 divisors (see below), whose sum is σ = 1589040408. Its totient is φ = 410074928.

The previous prime is 820149851. The next prime is 820149907. The reversal of 820149872 is 278941028.

820149872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25629668 + ... + 25629699.

Almost surely, 2^820149872 is an apocalyptic number.

It is an amenable number.

820149872 is a deficient number, since it is larger than the sum of its proper divisors (768890536).

820149872 is a wasteful number, since it uses less digits than its factorization.

820149872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51259375 (or 51259369 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 820149872 is about 28638.2588856236. The cubic root of 820149872 is about 936.0471827093.

The spelling of 820149872 in words is "eight hundred twenty million, one hundred forty-nine thousand, eight hundred seventy-two".