1872947640 has 32 divisors (see below), whose sum is σ = 5618843280. Its totient is φ = 499452672.

The previous prime is 1872947633. The next prime is 1872947669. The reversal of 1872947640 is 467492781.

It is a self number, because there is not a number n which added to its sum of digits gives 1872947640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7803829 + ... + 7804068.

Almost surely, 2^1872947640 is an apocalyptic number.

1872947640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1872947640 is an abundant number, since it is smaller than the sum of its proper divisors (3745895640).

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

1872947640 is a wasteful number, since it uses less digits than its factorization.

1872947640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15607911 (or 15607907 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 48.

The square root of 1872947640 is about 43277.5650886230. The cubic root of 1872947640 is about 1232.6559569060.

The spelling of 1872947640 in words is "one billion, eight hundred seventy-two million, nine hundred forty-seven thousand, six hundred forty".