45388821 has 8 divisors (see below), whose sum is σ = 63149760. Its totient is φ = 28943552.

The previous prime is 45388801. The next prime is 45388831. The reversal of 45388821 is 12888354.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 45388821 - 2⁶ = 45388757 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 45388821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45388801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328836 + ... + 328973.

It is an arithmetic number, because the mean of its divisors is an integer number (7893720).

Almost surely, 2^45388821 is an apocalyptic number.

It is an amenable number.

45388821 is a deficient number, since it is larger than the sum of its proper divisors (17760939).

45388821 is a wasteful number, since it uses less digits than its factorization.

45388821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657835.

The product of its digits is 61440, while the sum is 39.

The square root of 45388821 is about 6737.1226053858. The cubic root of 45388821 is about 356.7108345842.

The spelling of 45388821 in words is "forty-five million, three hundred eighty-eight thousand, eight hundred twenty-one".