42857280 has 168 divisors, whose sum is σ = 154058112. Its totient is φ = 10914816.

The previous prime is 42857267. The next prime is 42857329. The reversal of 42857280 is 8275824.

It is a happy number.

42857280 is a `hidden beast` number, since 4 + 2 + 8 + 572 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65917 + ... + 66563.

Almost surely, 2^42857280 is an apocalyptic number.

42857280 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 42857280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77029056).

42857280 is an abundant number, since it is smaller than the sum of its proper divisors (111200832).

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

42857280 is a wasteful number, since it uses less digits than its factorization.

42857280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693 (or 680 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 42857280 is about 6546.5471815301. The cubic root of 42857280 is about 349.9517756687.

The spelling of 42857280 in words is "forty-two million, eight hundred fifty-seven thousand, two hundred eighty".