42731215428 has 48 divisors (see below), whose sum is σ = 111299924736. Its totient is φ = 12647715360.

The previous prime is 42731215421. The next prime is 42731215463. The reversal of 42731215428 is 82451213724.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (42731215421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3758526 + ... + 3769877.

It is an arithmetic number, because the mean of its divisors is an integer number (2318748432).

Almost surely, 2^42731215428 is an apocalyptic number.

It is an amenable number.

42731215428 is an abundant number, since it is smaller than the sum of its proper divisors (68568709308).

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

42731215428 is a wasteful number, since it uses less digits than its factorization.

42731215428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7528464 (or 7528462 counting only the distinct ones).

The product of its digits is 107520, while the sum is 39.

The spelling of 42731215428 in words is "forty-two billion, seven hundred thirty-one million, two hundred fifteen thousand, four hundred twenty-eight".