42144392 has 16 divisors (see below), whose sum is σ = 80948700. Its totient is φ = 20558080.

The previous prime is 42144391. The next prime is 42144409. The reversal of 42144392 is 29344124.

It can be written as a sum of positive squares in 2 ways, for example, as 30625156 + 11519236 = 5534^2 + 3394^2 .

It is a super-2 number, since 2×42144392² = 3552299554099328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42144391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63917 + ... + 64572.

Almost surely, 2^42144392 is an apocalyptic number.

It is an amenable number.

42144392 is a deficient number, since it is larger than the sum of its proper divisors (38804308).

42144392 is a wasteful number, since it uses less digits than its factorization.

42144392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128536 (or 128532 counting only the distinct ones).

The product of its digits is 6912, while the sum is 29.

The square root of 42144392 is about 6491.8712248473. The cubic root of 42144392 is about 348.0005504902. Note that the first 3 decimals are identical.

The spelling of 42144392 in words is "forty-two million, one hundred forty-four thousand, three hundred ninety-two".