820142926 has 32 divisors (see below), whose sum is σ = 1293104736. Its totient is φ = 389760000.

The previous prime is 820142891. The next prime is 820142929. The reversal of 820142926 is 629241028.

It is a junction number, because it is equal to n+sod(n) for n = 820142891 and 820142900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820142929) 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, 564501 + ... + 565951.

It is an arithmetic number, because the mean of its divisors is an integer number (40409523).

Almost surely, 2^820142926 is an apocalyptic number.

820142926 is a deficient number, since it is larger than the sum of its proper divisors (472961810).

820142926 is a wasteful number, since it uses less digits than its factorization.

820142926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 820142926 is about 28638.1376140279. The cubic root of 820142926 is about 936.0445401833.

The spelling of 820142926 in words is "eight hundred twenty million, one hundred forty-two thousand, nine hundred twenty-six".