820470526 has 4 divisors (see below), whose sum is σ = 1230705792. Its totient is φ = 410235262.

The previous prime is 820470503. The next prime is 820470529. The reversal of 820470526 is 625074028.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 820470491 and 820470500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820470529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205117630 + ... + 205117633.

It is an arithmetic number, because the mean of its divisors is an integer number (307676448).

Almost surely, 2^820470526 is an apocalyptic number.

820470526 is a deficient number, since it is larger than the sum of its proper divisors (410235266).

820470526 is a wasteful number, since it uses less digits than its factorization.

820470526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410235265.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 820470526 is about 28643.8566886514. The cubic root of 820470526 is about 936.1691556055.

The spelling of 820470526 in words is "eight hundred twenty million, four hundred seventy thousand, five hundred twenty-six".