42023816 has 8 divisors (see below), whose sum is σ = 78794670. Its totient is φ = 21011904.

The previous prime is 42023809. The next prime is 42023819. The reversal of 42023816 is 61832024.

It can be written as a sum of positive squares in only one way, i.e., 23136100 + 18887716 = 4810^2 + 4346^2 .

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

It is a super-2 number, since 2×42023816² = 3532002222403712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42023819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2626481 + ... + 2626496.

Almost surely, 2^42023816 is an apocalyptic number.

It is an amenable number.

42023816 is a deficient number, since it is larger than the sum of its proper divisors (36770854).

42023816 is a wasteful number, since it uses less digits than its factorization.

42023816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5252983 (or 5252979 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 42023816 is about 6482.5778822934. The cubic root of 42023816 is about 347.6683544948.

The spelling of 42023816 in words is "forty-two million, twenty-three thousand, eight hundred sixteen".