90543400 has 48 divisors (see below), whose sum is σ = 212531040. Its totient is φ = 35870400.

The previous prime is 90543317. The next prime is 90543419. The reversal of 90543400 is 434509.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19285 + ... + 23515.

It is an arithmetic number, because the mean of its divisors is an integer number (4427730).

Almost surely, 2^90543400 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 90543400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106265520).

90543400 is an abundant number, since it is smaller than the sum of its proper divisors (121987640).

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

90543400 is a wasteful number, since it uses less digits than its factorization.

90543400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4354 (or 4345 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 90543400 is about 9515.4295751690. The cubic root of 90543400 is about 449.0405897139.

Adding to 90543400 its reverse (434509), we get a palindrome (90977909).

The spelling of 90543400 in words is "ninety million, five hundred forty-three thousand, four hundred".