42090001890 has 32 divisors (see below), whose sum is σ = 101400114816. Its totient is φ = 11181321600.

The previous prime is 42090001873. The next prime is 42090001901. The reversal of 42090001890 is 9810009024.

42090001890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2659411 + ... + 2675190.

It is an arithmetic number, because the mean of its divisors is an integer number (3168753588).

Almost surely, 2^42090001890 is an apocalyptic number.

42090001890 is an abundant number, since it is smaller than the sum of its proper divisors (59310112926).

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

42090001890 is a wasteful number, since it uses less digits than its factorization.

42090001890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5334874.

The product of its (nonzero) digits is 5184, while the sum is 33.

The spelling of 42090001890 in words is "forty-two billion, ninety million, one thousand, eight hundred ninety".