90784800 has 216 divisors, whose sum is σ = 332697456. Its totient is φ = 24157440.

The previous prime is 90784753. The next prime is 90784801. The reversal of 90784800 is 848709.

It is a tau number, because it is divible by the number of its divisors (216).

It is a super-2 number, since 2×90784800² = 16483759822080000, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (90784801) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 194167 + ... + 194633.

It is an arithmetic number, because the mean of its divisors is an integer number (1540266).

Almost surely, 2^90784800 is an apocalyptic number.

90784800 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 90784800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166348728).

90784800 is an abundant number, since it is smaller than the sum of its proper divisors (241912656).

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

90784800 is a wasteful number, since it uses less digits than its factorization.

90784800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502 (or 477 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 90784800 is about 9528.1057928636. The cubic root of 90784800 is about 449.4393016621.

The spelling of 90784800 in words is "ninety million, seven hundred eighty-four thousand, eight hundred".