442540988 has 12 divisors (see below), whose sum is σ = 775807032. Its totient is φ = 220881840.

The previous prime is 442540961. The next prime is 442541009. The reversal of 442540988 is 889045244.

It is a super-2 number, since 2×442540988² = 391685052120032288, which contains 22 as substring.

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, 94595 + ... + 99162.

It is an arithmetic number, because the mean of its divisors is an integer number (64650586).

Almost surely, 2^442540988 is an apocalyptic number.

It is an amenable number.

442540988 is a deficient number, since it is larger than the sum of its proper divisors (333266044).

442540988 is a wasteful number, since it uses less digits than its factorization.

442540988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194332 (or 194330 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 44.

The square root of 442540988 is about 21036.6581946848. The cubic root of 442540988 is about 762.0518125065.

The spelling of 442540988 in words is "four hundred forty-two million, five hundred forty thousand, nine hundred eighty-eight".