442357728 has 24 divisors (see below), whose sum is σ = 1161189288. Its totient is φ = 147452544.

The previous prime is 442357711. The next prime is 442357757. The reversal of 442357728 is 827753244.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 442357728.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2303851 + ... + 2304042.

It is an arithmetic number, because the mean of its divisors is an integer number (48382887).

Almost surely, 2^442357728 is an apocalyptic number.

442357728 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

442357728 is an abundant number, since it is smaller than the sum of its proper divisors (718831560).

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

442357728 is a wasteful number, since it uses less digits than its factorization.

442357728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4607906 (or 4607898 counting only the distinct ones).

The product of its digits is 376320, while the sum is 42.

The square root of 442357728 is about 21032.3020138072. The cubic root of 442357728 is about 761.9466072632.

The spelling of 442357728 in words is "four hundred forty-two million, three hundred fifty-seven thousand, seven hundred twenty-eight".