91243800 has 192 divisors, whose sum is σ = 320589600. Its totient is φ = 23846400.

The previous prime is 91243759. The next prime is 91243837. The reversal of 91243800 is 834219.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 329262 + ... + 329538.

Almost surely, 2^91243800 is an apocalyptic number.

91243800 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91243800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160294800).

91243800 is an abundant number, since it is smaller than the sum of its proper divisors (229345800).

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

91243800 is a wasteful number, since it uses less digits than its factorization.

91243800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 91243800 is about 9552.1620589268. The cubic root of 91243800 is about 450.1954706349.

The spelling of 91243800 in words is "ninety-one million, two hundred forty-three thousand, eight hundred".