90183040 has 128 divisors (see below), whose sum is σ = 230234400. Its totient is φ = 33718272.

The previous prime is 90183031. The next prime is 90183043. The reversal of 90183040 is 4038109.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 90182996 and 90183014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90183043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 798024 + ... + 798136.

Almost surely, 2^90183040 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 90183040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115117200).

90183040 is an abundant number, since it is smaller than the sum of its proper divisors (140051360).

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

90183040 is a wasteful number, since it uses less digits than its factorization.

90183040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204 (or 192 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 90183040 is about 9496.4751355437. The cubic root of 90183040 is about 448.4440749763. Note that the first 3 decimals are identical.

The spelling of 90183040 in words is "ninety million, one hundred eighty-three thousand, forty".