42993444 has 24 divisors (see below), whose sum is σ = 108035200. Its totient is φ = 13228704.

The previous prime is 42993443. The next prime is 42993451. The reversal of 42993444 is 44439924.

It is a happy number.

It is a super-2 number, since 2×42993444² = 3696872453962272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (42993443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137644 + ... + 137955.

Almost surely, 2^42993444 is an apocalyptic number.

It is an amenable number.

42993444 is an abundant number, since it is smaller than the sum of its proper divisors (65041756).

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

42993444 is a wasteful number, since it uses less digits than its factorization.

42993444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275619 (or 275617 counting only the distinct ones).

The product of its digits is 124416, while the sum is 39.

The square root of 42993444 is about 6556.9386149330. The cubic root of 42993444 is about 350.3220002673.

The spelling of 42993444 in words is "forty-two million, nine hundred ninety-three thousand, four hundred forty-four".