1905297912 has 192 divisors, whose sum is σ = 6203620800. Its totient is φ = 516741120.

The previous prime is 1905297871. The next prime is 1905297931. The reversal of 1905297912 is 2197925091.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 890508 + ... + 892644.

It is an arithmetic number, because the mean of its divisors is an integer number (32310525).

Almost surely, 2^1905297912 is an apocalyptic number.

1905297912 is a gapful number since it is divisible by the number (12) 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 1905297912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3101810400).

1905297912 is an abundant number, since it is smaller than the sum of its proper divisors (4298322888).

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

1905297912 is a wasteful number, since it uses less digits than its factorization.

1905297912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2246 (or 2239 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 45.

The square root of 1905297912 is about 43649.7183496068. The cubic root of 1905297912 is about 1239.7124532697.

It can be divided in two parts, 19052 and 97912, that added together give a square (116964 = 342²).

The spelling of 1905297912 in words is "one billion, nine hundred five million, two hundred ninety-seven thousand, nine hundred twelve".