42785272 has 8 divisors (see below), whose sum is σ = 80222400. Its totient is φ = 21392632.

The previous prime is 42785269. The next prime is 42785279. The reversal of 42785272 is 27258724.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×42785272² = 3661159000227968, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42785279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2674072 + ... + 2674087.

It is an arithmetic number, because the mean of its divisors is an integer number (10027800).

Almost surely, 2^42785272 is an apocalyptic number.

It is an amenable number.

42785272 is a deficient number, since it is larger than the sum of its proper divisors (37437128).

42785272 is a wasteful number, since it uses less digits than its factorization.

42785272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5348165 (or 5348161 counting only the distinct ones).

The product of its digits is 62720, while the sum is 37.

The square root of 42785272 is about 6541.0451764225. The cubic root of 42785272 is about 349.7556716556.

The spelling of 42785272 in words is "forty-two million, seven hundred eighty-five thousand, two hundred seventy-two".