90720548 has 12 divisors (see below), whose sum is σ = 160545420. Its totient is φ = 44850432.

The previous prime is 90720529. The next prime is 90720571. The reversal of 90720548 is 84502709.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 45454564 + 45265984 = 6742^2 + 6728^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127061 + ... + 127772.

It is an arithmetic number, because the mean of its divisors is an integer number (13378785).

Almost surely, 2^90720548 is an apocalyptic number.

It is an amenable number.

90720548 is a deficient number, since it is larger than the sum of its proper divisors (69824872).

90720548 is a wasteful number, since it uses less digits than its factorization.

90720548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254926 (or 254924 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 90720548 is about 9524.7334870851. The cubic root of 90720548 is about 449.3332479716. Note that the first 3 decimals are identical.

The spelling of 90720548 in words is "ninety million, seven hundred twenty thousand, five hundred forty-eight".