91454544 has 60 divisors (see below), whose sum is σ = 257546016. Its totient is φ = 30294336.

The previous prime is 91454537. The next prime is 91454549. The reversal of 91454544 is 44545419.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 91454499 and 91454508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91454549) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22147 + ... + 25949.

Almost surely, 2^91454544 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 91454544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128773008).

91454544 is an abundant number, since it is smaller than the sum of its proper divisors (166091472).

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

91454544 is a wasteful number, since it uses less digits than its factorization.

91454544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3984 (or 3975 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 91454544 is about 9563.1869165044. The cubic root of 91454544 is about 450.5418066542.

It can be divided in two parts, 9145 and 4544, that added together give a square (13689 = 117²).

The spelling of 91454544 in words is "ninety-one million, four hundred fifty-four thousand, five hundred forty-four".