90551040 has 72 divisors (see below), whose sum is σ = 289209648. Its totient is φ = 24145920.

The previous prime is 90551039. The next prime is 90551047. The reversal of 90551040 is 4015509.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 90551040.

It is not an unprimeable number, because it can be changed into a prime (90551047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7951 + ... + 15630.

Almost surely, 2^90551040 is an apocalyptic number.

It is an amenable number.

90551040 is an abundant number, since it is smaller than the sum of its proper divisors (198658608).

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

90551040 is a wasteful number, since it uses less digits than its factorization.

90551040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23605 (or 23591 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 90551040 is about 9515.8310199372. The cubic root of 90551040 is about 449.0532192875.

Adding to 90551040 its reverse (4015509), we get a palindrome (94566549).

The spelling of 90551040 in words is "ninety million, five hundred fifty-one thousand, forty".