1901187712 has 64 divisors (see below), whose sum is σ = 3938538240. Its totient is φ = 913397760.

The previous prime is 1901187689. The next prime is 1901187719. The reversal of 1901187712 is 2177811091.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×1901187712² = 7229029432519589888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1901187719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 348913 + ... + 354319.

It is an arithmetic number, because the mean of its divisors is an integer number (61539660).

Almost surely, 2^1901187712 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 1901187712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1969269120).

1901187712 is an abundant number, since it is smaller than the sum of its proper divisors (2037350528).

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

1901187712 is an equidigital number, since it uses as much as digits as its factorization.

1901187712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5529 (or 5517 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 37.

The square root of 1901187712 is about 43602.6112979487. The cubic root of 1901187712 is about 1238.8203557571.

The spelling of 1901187712 in words is "one billion, nine hundred one million, one hundred eighty-seven thousand, seven hundred twelve".