42187990438 has 12 divisors (see below), whose sum is σ = 69557885460. Its totient is φ = 19176359180.

The previous prime is 42187990423. The next prime is 42187990441. The reversal of 42187990438 is 83409978124.

42187990438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 87165028 + ... + 87165511.

It is an arithmetic number, because the mean of its divisors is an integer number (5796490455).

Almost surely, 2^42187990438 is an apocalyptic number.

42187990438 is a deficient number, since it is larger than the sum of its proper divisors (27369895022).

42187990438 is a wasteful number, since it uses less digits than its factorization.

42187990438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174330563 (or 174330552 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 42187990438 in words is "forty-two billion, one hundred eighty-seven million, nine hundred ninety thousand, four hundred thirty-eight".