90131476240 has 40 divisors (see below), whose sum is σ = 225675352728. Its totient is φ = 33279313920.

The previous prime is 90131476229. The next prime is 90131476247. The reversal of 90131476240 is 4267413109.

It can be written as a sum of positive squares in 4 ways, for example, as 11154739456 + 78976736784 = 105616^2 + 281028^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 90131476240.

It is not an unprimeable number, because it can be changed into a prime (90131476247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43331401 + ... + 43333480.

Almost surely, 2^90131476240 is an apocalyptic number.

It is an amenable number.

90131476240 is an abundant number, since it is smaller than the sum of its proper divisors (135543876488).

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

90131476240 is a wasteful number, since it uses less digits than its factorization.

90131476240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86664907 (or 86664901 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

Adding to 90131476240 its reverse (4267413109), we get a palindrome (94398889349).

The spelling of 90131476240 in words is "ninety billion, one hundred thirty-one million, four hundred seventy-six thousand, two hundred forty".