91473888 has 144 divisors (see below), whose sum is σ = 273926016. Its totient is φ = 26503680.

The previous prime is 91473871. The next prime is 91473913. The reversal of 91473888 is 88837419.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 888045 + ... + 888147.

It is an arithmetic number, because the mean of its divisors is an integer number (1902264).

Almost surely, 2^91473888 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 91473888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136963008).

91473888 is an abundant number, since it is smaller than the sum of its proper divisors (182452128).

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

91473888 is a wasteful number, since it uses less digits than its factorization.

91473888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185 (or 148 counting only the distinct ones).

The product of its digits is 387072, while the sum is 48.

The square root of 91473888 is about 9564.1982413582. The cubic root of 91473888 is about 450.5735698520.

The spelling of 91473888 in words is "ninety-one million, four hundred seventy-three thousand, eight hundred eighty-eight".