442403139 has 16 divisors (see below), whose sum is σ = 610698240. Its totient is φ = 284578080.

The previous prime is 442403123. The next prime is 442403173. The reversal of 442403139 is 931304244.

It is not a de Polignac number, because 442403139 - 2⁴ = 442403123 is a prime.

It is a super-3 number, since 3×442403139³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (442403119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25417 + ... + 39125.

It is an arithmetic number, because the mean of its divisors is an integer number (38168640).

Almost surely, 2^442403139 is an apocalyptic number.

442403139 is a deficient number, since it is larger than the sum of its proper divisors (168295101).

442403139 is a wasteful number, since it uses less digits than its factorization.

442403139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14090.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 442403139 is about 21033.3815398285. The cubic root of 442403139 is about 761.9726793547.

The spelling of 442403139 in words is "four hundred forty-two million, four hundred three thousand, one hundred thirty-nine".