91898928 has 160 divisors (see below), whose sum is σ = 292481280. Its totient is φ = 27394560.

The previous prime is 91898927. The next prime is 91898929. The reversal of 91898928 is 82989819.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (91898927) and next prime (91898929).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (91898927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 394300 + ... + 394532.

It is an arithmetic number, because the mean of its divisors is an integer number (1828008).

Almost surely, 2^91898928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91898928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146240640).

91898928 is an abundant number, since it is smaller than the sum of its proper divisors (200582352).

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

91898928 is a wasteful number, since it uses less digits than its factorization.

91898928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344 (or 332 counting only the distinct ones).

The product of its digits is 746496, while the sum is 54.

The square root of 91898928 is about 9586.3928565441. The cubic root of 91898928 is about 451.2703658930.

The spelling of 91898928 in words is "ninety-one million, eight hundred ninety-eight thousand, nine hundred twenty-eight".