1906493890 has 32 divisors (see below), whose sum is σ = 3924267264. Its totient is φ = 653265600.

The previous prime is 1906493879. The next prime is 1906493923. The reversal of 1906493890 is 983946091.

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, 125907 + ... + 140233.

It is an arithmetic number, because the mean of its divisors is an integer number (122633352).

Almost surely, 2^1906493890 is an apocalyptic number.

1906493890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1906493890 is an abundant number, since it is smaller than the sum of its proper divisors (2017773374).

1906493890 is a wasteful number, since it uses less digits than its factorization.

1906493890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16242.

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 1906493890 is about 43663.4159222569. The cubic root of 1906493890 is about 1239.9717930628.

The spelling of 1906493890 in words is "one billion, nine hundred six million, four hundred ninety-three thousand, eight hundred ninety".