90280705 has 8 divisors (see below), whose sum is σ = 108479232. Its totient is φ = 72129648.

The previous prime is 90280651. The next prime is 90280717. The reversal of 90280705 is 50708209.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90280705 - 2¹³ = 90272513 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7537 + ... + 15406.

It is an arithmetic number, because the mean of its divisors is an integer number (13559904).

Almost surely, 2^90280705 is an apocalyptic number.

It is an amenable number.

90280705 is a deficient number, since it is larger than the sum of its proper divisors (18198527).

90280705 is a wasteful number, since it uses less digits than its factorization.

90280705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23735.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 90280705 is about 9501.6159152010. The cubic root of 90280705 is about 448.6058995271.

The spelling of 90280705 in words is "ninety million, two hundred eighty thousand, seven hundred five".