90025140 has 24 divisors (see below), whose sum is σ = 252070560. Its totient is φ = 24006688.

The previous prime is 90025079. The next prime is 90025189. The reversal of 90025140 is 4152009.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 750150 + ... + 750269.

It is an arithmetic number, because the mean of its divisors is an integer number (10502940).

Almost surely, 2^90025140 is an apocalyptic number.

It is an amenable number.

90025140 is an abundant number, since it is smaller than the sum of its proper divisors (162045420).

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

90025140 is a wasteful number, since it uses less digits than its factorization.

90025140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500431 (or 1500429 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 90025140 is about 9488.1578823289. The cubic root of 90025140 is about 448.1821976286.

Adding to 90025140 its reverse (4152009), we get a palindrome (94177149).

The spelling of 90025140 in words is "ninety million, twenty-five thousand, one hundred forty".