442499670 has 96 divisors (see below), whose sum is σ = 1189188000. Its totient is φ = 114089472.

The previous prime is 442499641. The next prime is 442499671. The reversal of 442499670 is 76994244.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442499671) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 421306 + ... + 422354.

It is an arithmetic number, because the mean of its divisors is an integer number (12387375).

Almost surely, 2^442499670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 442499670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (594594000).

442499670 is an abundant number, since it is smaller than the sum of its proper divisors (746688330).

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

442499670 is a wasteful number, since it uses less digits than its factorization.

442499670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214 (or 1211 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 442499670 is about 21035.6761241468. The cubic root of 442499670 is about 762.0280953536.

The spelling of 442499670 in words is "four hundred forty-two million, four hundred ninety-nine thousand, six hundred seventy".