442687851408 has 40 divisors (see below), whose sum is σ = 1247574855456. Its totient is φ = 134147833600.

The previous prime is 442687851391. The next prime is 442687851409. The reversal of 442687851408 is 804158786244.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (442687851409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 419211453 + ... + 419212508.

Almost surely, 2^442687851408 is an apocalyptic number.

442687851408 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

442687851408 is an abundant number, since it is smaller than the sum of its proper divisors (804887004048).

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

442687851408 is a wasteful number, since it uses less digits than its factorization.

442687851408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838423983 (or 838423977 counting only the distinct ones).

The product of its (nonzero) digits is 13762560, while the sum is 57.

The spelling of 442687851408 in words is "four hundred forty-two billion, six hundred eighty-seven million, eight hundred fifty-one thousand, four hundred eight".