90780948 has 18 divisors (see below), whose sum is σ = 229474154. Its totient is φ = 30260304.

The previous prime is 90780947. The next prime is 90780953. The reversal of 90780948 is 84908709.

It can be written as a sum of positive squares in only one way, i.e., 83393424 + 7387524 = 9132^2 + 2718^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90780947) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1260811 + ... + 1260882.

Almost surely, 2^90780948 is an apocalyptic number.

It is an amenable number.

90780948 is an abundant number, since it is smaller than the sum of its proper divisors (138693206).

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

90780948 is a wasteful number, since it uses less digits than its factorization.

90780948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2521703 (or 2521698 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 90780948 is about 9527.9036519058. The cubic root of 90780948 is about 449.4329450008.

The spelling of 90780948 in words is "ninety million, seven hundred eighty thousand, nine hundred forty-eight".