820081446 has 8 divisors (see below), whose sum is σ = 1640162904. Its totient is φ = 273360480.

The previous prime is 820081429. The next prime is 820081463. The reversal of 820081446 is 644180028.

It is an interprime number because it is at equal distance from previous prime (820081429) and next prime (820081463).

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

820081446 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68340115 + ... + 68340126.

It is an arithmetic number, because the mean of its divisors is an integer number (205020363).

Almost surely, 2^820081446 is an apocalyptic number.

820081446 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.

820081446 is a wasteful number, since it uses less digits than its factorization.

820081446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136680246.

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 820081446 is about 28637.0642000887. The cubic root of 820081446 is about 936.0211501722.

The spelling of 820081446 in words is "eight hundred twenty million, eighty-one thousand, four hundred forty-six".