90360090 has 32 divisors (see below), whose sum is σ = 240960960. Its totient is φ = 24095952.

The previous prime is 90360089. The next prime is 90360097. The reversal of 90360090 is 9006309.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90360097) 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, 167064 + ... + 167603.

It is an arithmetic number, because the mean of its divisors is an integer number (7530030).

Almost surely, 2^90360090 is an apocalyptic number.

90360090 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

90360090 is an abundant number, since it is smaller than the sum of its proper divisors (150600870).

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

90360090 is a wasteful number, since it uses less digits than its factorization.

90360090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334683 (or 334677 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 90360090 is about 9505.7924446098. The cubic root of 90360090 is about 448.7373493432.

Adding to 90360090 its reverse (9006309), we get a palindrome (99366399).

The spelling of 90360090 in words is "ninety million, three hundred sixty thousand, ninety".