1908149904 has 120 divisors (see below), whose sum is σ = 5674949280. Its totient is φ = 596450304.

The previous prime is 1908149863. The next prime is 1908149909. The reversal of 1908149904 is 4099418091.

It is a super-2 number, since 2×1908149904² = 7282072112270418432, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1908149904.

It is not an unprimeable number, because it can be changed into a prime (1908149909) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 750267 + ... + 752805.

It is an arithmetic number, because the mean of its divisors is an integer number (47291244).

Almost surely, 2^1908149904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1908149904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2837474640).

1908149904 is an abundant number, since it is smaller than the sum of its proper divisors (3766799376).

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

1908149904 is a wasteful number, since it uses less digits than its factorization.

1908149904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2877 (or 2868 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 1908149904 is about 43682.3752101463. The cubic root of 1908149904 is about 1240.3307095716.

The spelling of 1908149904 in words is "one billion, nine hundred eight million, one hundred forty-nine thousand, nine hundred four".