42570840 has 128 divisors (see below), whose sum is σ = 142430400. Its totient is φ = 10106880.

The previous prime is 42570799. The next prime is 42570883. The reversal of 42570840 is 4807524.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 42570798 and 42570807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44770 + ... + 45710.

Almost surely, 2^42570840 is an apocalyptic number.

42570840 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 42570840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71215200).

42570840 is an abundant number, since it is smaller than the sum of its proper divisors (99859560).

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

42570840 is a wasteful number, since it uses less digits than its factorization.

42570840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997 (or 993 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 42570840 is about 6524.6333230305. The cubic root of 42570840 is about 349.1703888533.

The spelling of 42570840 in words is "forty-two million, five hundred seventy thousand, eight hundred forty".