90307071890 has 128 divisors (see below), whose sum is σ = 197104803840. Its totient is φ = 29121523200.

The previous prime is 90307071871. The next prime is 90307071931. The reversal of 90307071890 is 9817070309.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 56125406 + ... + 56127014.

It is an arithmetic number, because the mean of its divisors is an integer number (1539881280).

Almost surely, 2^90307071890 is an apocalyptic number.

90307071890 is an abundant number, since it is smaller than the sum of its proper divisors (106797731950).

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

90307071890 is a wasteful number, since it uses less digits than its factorization.

90307071890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2208.

The product of its (nonzero) digits is 95256, while the sum is 44.

The spelling of 90307071890 in words is "ninety billion, three hundred seven million, seventy-one thousand, eight hundred ninety".