42787688840 has 64 divisors (see below), whose sum is σ = 103712540400. Its totient is φ = 15793247232.

The previous prime is 42787688819. The next prime is 42787688927. The reversal of 42787688840 is 4888678724.

It can be written as a sum of positive squares in 8 ways, for example, as 24429064804 + 18358624036 = 156298^2 + 135494^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1762706 + ... + 1786814.

Almost surely, 2^42787688840 is an apocalyptic number.

42787688840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42787688840 is an abundant number, since it is smaller than the sum of its proper divisors (60924851560).

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

42787688840 is a wasteful number, since it uses less digits than its factorization.

42787688840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27546 (or 27542 counting only the distinct ones).

The product of its (nonzero) digits is 38535168, while the sum is 62.

The spelling of 42787688840 in words is "forty-two billion, seven hundred eighty-seven million, six hundred eighty-eight thousand, eight hundred forty".