90747280 has 40 divisors (see below), whose sum is σ = 227219832. Its totient is φ = 33506304.

The previous prime is 90747263. The next prime is 90747281. The reversal of 90747280 is 8274709.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3810304 + 86936976 = 1952^2 + 9324^2 .

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

It is not an unprimeable number, because it can be changed into a prime (90747281) 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, 42589 + ... + 44668.

Almost surely, 2^90747280 is an apocalyptic number.

It is an amenable number.

90747280 is an abundant number, since it is smaller than the sum of its proper divisors (136472552).

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

90747280 is a wasteful number, since it uses less digits than its factorization.

90747280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87283 (or 87277 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 90747280 is about 9526.1366775834. The cubic root of 90747280 is about 449.3773776168.

The spelling of 90747280 in words is "ninety million, seven hundred forty-seven thousand, two hundred eighty".