42308720 has 40 divisors (see below), whose sum is σ = 100774800. Its totient is φ = 16509440.

The previous prime is 42308711. The next prime is 42308737. The reversal of 42308720 is 2780324.

42308720 is nontrivially palindromic in base 9.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 42308720.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3170 + ... + 9729.

It is an arithmetic number, because the mean of its divisors is an integer number (2519370).

Almost surely, 2^42308720 is an apocalyptic number.

42308720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42308720 is an abundant number, since it is smaller than the sum of its proper divisors (58466080).

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

42308720 is a wasteful number, since it uses less digits than its factorization.

42308720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12953 (or 12947 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 42308720 is about 6504.5153547363. The cubic root of 42308720 is about 348.4522679162.

The spelling of 42308720 in words is "forty-two million, three hundred eight thousand, seven hundred twenty".