42020040428 has 12 divisors (see below), whose sum is σ = 77860663272. Its totient is φ = 19774136640.

The previous prime is 42020040427. The next prime is 42020040451. The reversal of 42020040428 is 82404002024.

It is a junction number, because it is equal to n+sod(n) for n = 42020040397 and 42020040406.

It is not an unprimeable number, because it can be changed into a prime (42020040427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308970818 + ... + 308970953.

It is an arithmetic number, because the mean of its divisors is an integer number (6488388606).

Almost surely, 2^42020040428 is an apocalyptic number.

It is an amenable number.

42020040428 is a deficient number, since it is larger than the sum of its proper divisors (35840622844).

42020040428 is a wasteful number, since it uses less digits than its factorization.

42020040428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617941792 (or 617941790 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 26.

The spelling of 42020040428 in words is "forty-two billion, twenty million, forty thousand, four hundred twenty-eight".