1881425640 has 32 divisors (see below), whose sum is σ = 5644277280. Its totient is φ = 501713472.

The previous prime is 1881425621. The next prime is 1881425647. The reversal of 1881425640 is 465241881.

It is not an unprimeable number, because it can be changed into a prime (1881425647) 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, 7839154 + ... + 7839393.

It is an arithmetic number, because the mean of its divisors is an integer number (176383665).

Almost surely, 2^1881425640 is an apocalyptic number.

1881425640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1881425640 is an abundant number, since it is smaller than the sum of its proper divisors (3762851640).

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

1881425640 is a wasteful number, since it uses less digits than its factorization.

1881425640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15678561 (or 15678557 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 39.

The square root of 1881425640 is about 43375.4036292459. The cubic root of 1881425640 is about 1234.5130525210.

The spelling of 1881425640 in words is "one billion, eight hundred eighty-one million, four hundred twenty-five thousand, six hundred forty".