45031644 has 36 divisors (see below), whose sum is σ = 130092144. Its totient is φ = 12866112.

The previous prime is 45031633. The next prime is 45031661. The reversal of 45031644 is 44613054.

45031644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×45031644² = 4055697922685472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 89097 + ... + 89600.

Almost surely, 2^45031644 is an apocalyptic number.

It is an amenable number.

45031644 is an abundant number, since it is smaller than the sum of its proper divisors (85060500).

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

45031644 is a wasteful number, since it uses less digits than its factorization.

45031644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178714 (or 178709 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 45031644 is about 6710.5621225051. The cubic root of 45031644 is about 355.7726844929.

Adding to 45031644 its reverse (44613054), we get a palindrome (89644698).

The spelling of 45031644 in words is "forty-five million, thirty-one thousand, six hundred forty-four".