42023656 has 8 divisors (see below), whose sum is σ = 78794370. Its totient is φ = 21011824.

The previous prime is 42023633. The next prime is 42023659. The reversal of 42023656 is 65632024.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 37332100 + 4691556 = 6110^2 + 2166^2 .

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

It is not an unprimeable number, because it can be changed into a prime (42023659) 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 as a sum of consecutive naturals, namely, 2626471 + ... + 2626486.

Almost surely, 2^42023656 is an apocalyptic number.

It is an amenable number.

42023656 is a deficient number, since it is larger than the sum of its proper divisors (36770714).

42023656 is a wasteful number, since it uses less digits than its factorization.

42023656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5252963 (or 5252959 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 42023656 is about 6482.5655415121. The cubic root of 42023656 is about 347.6679132609.

The spelling of 42023656 in words is "forty-two million, twenty-three thousand, six hundred fifty-six".