90305970 has 16 divisors (see below), whose sum is σ = 216734400. Its totient is φ = 24081584.

The previous prime is 90305953. The next prime is 90305983. The reversal of 90305970 is 7950309.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon 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, 1505070 + ... + 1505129.

It is an arithmetic number, because the mean of its divisors is an integer number (13545900).

Almost surely, 2^90305970 is an apocalyptic number.

90305970 is an abundant number, since it is smaller than the sum of its proper divisors (126428430).

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

90305970 is a wasteful number, since it uses less digits than its factorization.

90305970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3010209.

The product of its (nonzero) digits is 8505, while the sum is 33.

The square root of 90305970 is about 9502.9453328955. The cubic root of 90305970 is about 448.6477429861.

The spelling of 90305970 in words is "ninety million, three hundred five thousand, nine hundred seventy".