90272540 has 12 divisors (see below), whose sum is σ = 189572376. Its totient is φ = 36109008.

The previous prime is 90272531. The next prime is 90272561. The reversal of 90272540 is 4527209.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2256794 + ... + 2256833.

It is an arithmetic number, because the mean of its divisors is an integer number (15797698).

Almost surely, 2^90272540 is an apocalyptic number.

It is an amenable number.

90272540 is an abundant number, since it is smaller than the sum of its proper divisors (99299836).

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

90272540 is a wasteful number, since it uses less digits than its factorization.

90272540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4513636 (or 4513634 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 90272540 is about 9501.1862417279. The cubic root of 90272540 is about 448.5923751252.

Adding to 90272540 its reverse (4527209), we get a palindrome (94799749).

It can be divided in two parts, 902 and 72540, that multiplied together give a triangular number (65431080 = T₁₁₄₃₉).

The spelling of 90272540 in words is "ninety million, two hundred seventy-two thousand, five hundred forty".