1945090908 has 90 divisors (see below), whose sum is σ = 5255011608. Its totient is φ = 627348240.

The previous prime is 1945090897. The next prime is 1945090951. The reversal of 1945090908 is 8090905491.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 308241 + ... + 314487.

Almost surely, 2^1945090908 is an apocalyptic number.

1945090908 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1945090908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2627505804).

1945090908 is an abundant number, since it is smaller than the sum of its proper divisors (3309920700).

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

1945090908 is a wasteful number, since it uses less digits than its factorization.

1945090908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6325 (or 6283 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 1945090908 is about 44103.1847829610. The cubic root of 1945090908 is about 1248.2837049168.

The spelling of 1945090908 in words is "one billion, nine hundred forty-five million, ninety thousand, nine hundred eight".