1901189292 has 96 divisors (see below), whose sum is σ = 4772984832. Its totient is φ = 587575296.

The previous prime is 1901189291. The next prime is 1901189317. The reversal of 1901189292 is 2929811091.

It is a super-2 number, since 2×1901189292² = 7229041448030922528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1901189291) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1465188 + ... + 1466484.

It is an arithmetic number, because the mean of its divisors is an integer number (49718592).

Almost surely, 2^1901189292 is an apocalyptic number.

1901189292 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 1901189292, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2386492416).

1901189292 is an abundant number, since it is smaller than the sum of its proper divisors (2871795540).

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

1901189292 is a wasteful number, since it uses less digits than its factorization.

1901189292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487 (or 1485 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 42.

The square root of 1901189292 is about 43602.6294161258. The cubic root of 1901189292 is about 1238.8206989348.

The spelling of 1901189292 in words is "one billion, nine hundred one million, one hundred eighty-nine thousand, two hundred ninety-two".