90140340 has 48 divisors (see below), whose sum is σ = 253012032. Its totient is φ = 23978496.

The previous prime is 90140339. The next prime is 90140359. The reversal of 90140340 is 4304109.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26412 + ... + 29628.

It is an arithmetic number, because the mean of its divisors is an integer number (5271084).

Almost surely, 2^90140340 is an apocalyptic number.

It is an amenable number.

90140340 is an abundant number, since it is smaller than the sum of its proper divisors (162871692).

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

90140340 is a wasteful number, since it uses less digits than its factorization.

90140340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3696 (or 3694 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 90140340 is about 9494.2266667697. The cubic root of 90140340 is about 448.3732871469.

Adding to 90140340 its reverse (4304109), we get a palindrome (94444449).

The spelling of 90140340 in words is "ninety million, one hundred forty thousand, three hundred forty".