442549404 has 36 divisors (see below), whose sum is σ = 1220364600. Its totient is φ = 134105760.

The previous prime is 442549391. The next prime is 442549409. The reversal of 442549404 is 404945244.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442549409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 558379 + ... + 559170.

Almost surely, 2^442549404 is an apocalyptic number.

442549404 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

442549404 is an abundant number, since it is smaller than the sum of its proper divisors (777815196).

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

442549404 is a wasteful number, since it uses less digits than its factorization.

442549404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117570 (or 1117565 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

The square root of 442549404 is about 21036.8582255051. The cubic root of 442549404 is about 762.0566432360.

The spelling of 442549404 in words is "four hundred forty-two million, five hundred forty-nine thousand, four hundred four".