820426746 has 8 divisors (see below), whose sum is σ = 1640853504. Its totient is φ = 273475580.

The previous prime is 820426729. The next prime is 820426753. The reversal of 820426746 is 647624028.

It is a sphenic number, since it is the product of 3 distinct primes.

820426746 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68368890 + ... + 68368901.

It is an arithmetic number, because the mean of its divisors is an integer number (205106688).

Almost surely, 2^820426746 is an apocalyptic number.

820426746 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

820426746 is a wasteful number, since it uses less digits than its factorization.

820426746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136737796.

The product of its (nonzero) digits is 129024, while the sum is 39.

The square root of 820426746 is about 28643.0924657237. The cubic root of 820426746 is about 936.1525040975.

It can be divided in two parts, 82042 and 6746, that added together give a palindrome (88788).

The spelling of 820426746 in words is "eight hundred twenty million, four hundred twenty-six thousand, seven hundred forty-six".