442812640 has 24 divisors (see below), whose sum is σ = 1046145240. Its totient is φ = 177124992.

The previous prime is 442812607. The next prime is 442812679. The reversal of 442812640 is 46218244.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1383630 + ... + 1383949.

It is an arithmetic number, because the mean of its divisors is an integer number (43589385).

Almost surely, 2^442812640 is an apocalyptic number.

442812640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

442812640 is an abundant number, since it is smaller than the sum of its proper divisors (603332600).

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

442812640 is a wasteful number, since it uses less digits than its factorization.

442812640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2767594 (or 2767586 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 31.

The square root of 442812640 is about 21043.1138380231. The cubic root of 442812640 is about 762.2077080890.

The spelling of 442812640 in words is "four hundred forty-two million, eight hundred twelve thousand, six hundred forty".