42656920 has 16 divisors (see below), whose sum is σ = 95978160. Its totient is φ = 17062752.

The previous prime is 42656917. The next prime is 42656921. The reversal of 42656920 is 2965624.

It is a super-2 number, since 2×42656920² = 3639225647772800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42656921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 533172 + ... + 533251.

It is an arithmetic number, because the mean of its divisors is an integer number (5998635).

Almost surely, 2^42656920 is an apocalyptic number.

42656920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42656920 is an abundant number, since it is smaller than the sum of its proper divisors (53321240).

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

42656920 is a wasteful number, since it uses less digits than its factorization.

42656920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066434 (or 1066430 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 42656920 is about 6531.2265310583. The cubic root of 42656920 is about 349.4055760632.

The spelling of 42656920 in words is "forty-two million, six hundred fifty-six thousand, nine hundred twenty".