42556770 has 96 divisors (see below), whose sum is σ = 119508480. Its totient is φ = 10471680.

The previous prime is 42556757. The next prime is 42556781. The reversal of 42556770 is 7765524.

42556770 is a `hidden beast` number, since 4 + 25 + 567 + 70 = 666.

It is a super-2 number, since 2×42556770² = 3622157345665800, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 69807 + ... + 70413.

It is an arithmetic number, because the mean of its divisors is an integer number (1244880).

Almost surely, 2^42556770 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42556770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59754240).

42556770 is an abundant number, since it is smaller than the sum of its proper divisors (76951710).

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

42556770 is a wasteful number, since it uses less digits than its factorization.

42556770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680 (or 677 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 36.

The square root of 42556770 is about 6523.5550124146. Note that the first 3 decimals coincide. The cubic root of 42556770 is about 349.1319167543.

It can be divided in two parts, 4255 and 6770, that added together give a square (11025 = 105²).

The spelling of 42556770 in words is "forty-two million, five hundred fifty-six thousand, seven hundred seventy".