45642138 has 16 divisors (see below), whose sum is σ = 91355040. Its totient is φ = 15202256.

The previous prime is 45642133. The next prime is 45642139. The reversal of 45642138 is 83124654.

45642138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×45642138² = 4166409522422088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 45642099 and 45642108.

It is not an unprimeable number, because it can be changed into a prime (45642131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9448 + ... + 13436.

It is an arithmetic number, because the mean of its divisors is an integer number (5709690).

Almost surely, 2^45642138 is an apocalyptic number.

45642138 is an abundant number, since it is smaller than the sum of its proper divisors (45712902).

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

45642138 is a wasteful number, since it uses less digits than its factorization.

45642138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5901.

The product of its digits is 23040, while the sum is 33.

The square root of 45642138 is about 6755.8965356198. The cubic root of 45642138 is about 357.3732101283.

The spelling of 45642138 in words is "forty-five million, six hundred forty-two thousand, one hundred thirty-eight".