42508857720 has 256 divisors, whose sum is σ = 153247334400. Its totient is φ = 9227151360.

The previous prime is 42508857709. The next prime is 42508857767. The reversal of 42508857720 is 2775880524.

It is a self number, because there is not a number n which added to its sum of digits gives 42508857720.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1471657 + ... + 1500263.

It is an arithmetic number, because the mean of its divisors is an integer number (598622400).

Almost surely, 2^42508857720 is an apocalyptic number.

42508857720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42508857720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76623667200).

42508857720 is an abundant number, since it is smaller than the sum of its proper divisors (110738476680).

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

42508857720 is a wasteful number, since it uses less digits than its factorization.

42508857720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28718 (or 28714 counting only the distinct ones).

The product of its (nonzero) digits is 1254400, while the sum is 48.

The spelling of 42508857720 in words is "forty-two billion, five hundred eight million, eight hundred fifty-seven thousand, seven hundred twenty".