442981749 has 16 divisors (see below), whose sum is σ = 677519360. Its totient is φ = 252195120.

The previous prime is 442981729. The next prime is 442981769. The reversal of 442981749 is 947189244.

It is an interprime number because it is at equal distance from previous prime (442981729) and next prime (442981769).

It is not a de Polignac number, because 442981749 - 2¹⁵ = 442948981 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 442981698 and 442981707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442981729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33229 + ... + 44610.

It is an arithmetic number, because the mean of its divisors is an integer number (42344960).

Almost surely, 2^442981749 is an apocalyptic number.

It is an amenable number.

442981749 is a deficient number, since it is larger than the sum of its proper divisors (234537611).

442981749 is a wasteful number, since it uses less digits than its factorization.

442981749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78120.

The product of its digits is 580608, while the sum is 48.

The square root of 442981749 is about 21047.1316097942. The cubic root of 442981749 is about 762.3047241230.

The spelling of 442981749 in words is "four hundred forty-two million, nine hundred eighty-one thousand, seven hundred forty-nine".