442420136 has 8 divisors (see below), whose sum is σ = 829537770. Its totient is φ = 221210064.

The previous prime is 442420117. The next prime is 442420171. The reversal of 442420136 is 631024244.

It can be written as a sum of positive squares in only one way, i.e., 395771236 + 46648900 = 19894^2 + 6830^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27651251 + ... + 27651266.

Almost surely, 2^442420136 is an apocalyptic number.

It is an amenable number.

442420136 is a deficient number, since it is larger than the sum of its proper divisors (387117634).

442420136 is a wasteful number, since it uses less digits than its factorization.

442420136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55302523 (or 55302519 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 442420136 is about 21033.7855841501. The cubic root of 442420136 is about 761.9824374860.

The spelling of 442420136 in words is "four hundred forty-two million, four hundred twenty thousand, one hundred thirty-six".