90540380 has 48 divisors (see below), whose sum is σ = 218211840. Its totient is φ = 30911808.

The previous prime is 90540379. The next prime is 90540389. The reversal of 90540380 is 8304509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90540389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35591 + ... + 38049.

It is an arithmetic number, because the mean of its divisors is an integer number (4546080).

Almost surely, 2^90540380 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 90540380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109105920).

90540380 is an abundant number, since it is smaller than the sum of its proper divisors (127671460).

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

90540380 is a wasteful number, since it uses less digits than its factorization.

90540380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2738 (or 2736 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 90540380 is about 9515.2708842155. The cubic root of 90540380 is about 449.0355971996.

Adding to 90540380 its reverse (8304509), we get a palindrome (98844889).

The spelling of 90540380 in words is "ninety million, five hundred forty thousand, three hundred eighty".