45381632 has 24 divisors (see below), whose sum is σ = 90745200. Its totient is φ = 22689792.

The previous prime is 45381631. The next prime is 45381667. The reversal of 45381632 is 23618354.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45381631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9032 + ... + 13127.

It is an arithmetic number, because the mean of its divisors is an integer number (3781050).

Almost surely, 2^45381632 is an apocalyptic number.

It is an amenable number.

45381632 is a deficient number, since it is larger than the sum of its proper divisors (45363568).

45381632 is an equidigital number, since it uses as much as digits as its factorization.

45381632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22181 (or 22161 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 45381632 is about 6736.5890478788. The cubic root of 45381632 is about 356.6920008014.

Adding to 45381632 its reverse (23618354), we get a palindrome (68999986).

The spelling of 45381632 in words is "forty-five million, three hundred eighty-one thousand, six hundred thirty-two".