42744744 has 48 divisors (see below), whose sum is σ = 132306720. Its totient is φ = 12212640.

The previous prime is 42744721. The next prime is 42744763. The reversal of 42744744 is 44744724.

It is a super-2 number, since 2×42744744² = 3654226279251072, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 42744699 and 42744708.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41902 + ... + 42909.

It is an arithmetic number, because the mean of its divisors is an integer number (2756390).

Almost surely, 2^42744744 is an apocalyptic number.

It is an amenable number.

42744744 is an abundant number, since it is smaller than the sum of its proper divisors (89561976).

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

42744744 is a wasteful number, since it uses less digits than its factorization.

42744744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84830 (or 84823 counting only the distinct ones).

The product of its digits is 100352, while the sum is 36.

The square root of 42744744 is about 6537.9464665903. The cubic root of 42744744 is about 349.6452023653.

The spelling of 42744744 in words is "forty-two million, seven hundred forty-four thousand, seven hundred forty-four".