91426820 has 12 divisors (see below), whose sum is σ = 191996364. Its totient is φ = 36570720.

The previous prime is 91426801. The next prime is 91426837. The reversal of 91426820 is 2862419.

It can be written as a sum of positive squares in 2 ways, for example, as 24285184 + 67141636 = 4928^2 + 8194^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

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, 2285651 + ... + 2285690.

It is an arithmetic number, because the mean of its divisors is an integer number (15999697).

Almost surely, 2^91426820 is an apocalyptic number.

It is an amenable number.

91426820 is an abundant number, since it is smaller than the sum of its proper divisors (100569544).

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

91426820 is a wasteful number, since it uses less digits than its factorization.

91426820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4571350 (or 4571348 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 91426820 is about 9561.7372898444. The cubic root of 91426820 is about 450.4962755343.

The spelling of 91426820 in words is "ninety-one million, four hundred twenty-six thousand, eight hundred twenty".