77850090 has 24 divisors (see below), whose sum is σ = 202410468. Its totient is φ = 20760000.

The previous prime is 77850079. The next prime is 77850121. The reversal of 77850090 is 9005877.

It can be written as a sum of positive squares in 2 ways, for example, as 77845329 + 4761 = 8823^2 + 69^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 432411 + ... + 432590.

Almost surely, 2^77850090 is an apocalyptic number.

77850090 is an abundant number, since it is smaller than the sum of its proper divisors (124560378).

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

77850090 is a wasteful number, since it uses less digits than its factorization.

77850090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865014 (or 865011 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The square root of 77850090 is about 8823.2698020632. The cubic root of 77850090 is about 426.9919685795.

The spelling of 77850090 in words is "seventy-seven million, eight hundred fifty thousand, ninety".