45388509 has 8 divisors (see below), whose sum is σ = 62604960. Its totient is φ = 29215536.

The previous prime is 45388481. The next prime is 45388537. The reversal of 45388509 is 90588354.

It is an interprime number because it is at equal distance from previous prime (45388481) and next prime (45388537).

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

It is not a de Polignac number, because 45388509 - 2⁵ = 45388477 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45388559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 260767 + ... + 260940.

It is an arithmetic number, because the mean of its divisors is an integer number (7825620).

Almost surely, 2^45388509 is an apocalyptic number.

It is an amenable number.

45388509 is a deficient number, since it is larger than the sum of its proper divisors (17216451).

45388509 is a wasteful number, since it uses less digits than its factorization.

45388509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521739.

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 45388509 is about 6737.0994500601. The cubic root of 45388509 is about 356.7100172461.

The spelling of 45388509 in words is "forty-five million, three hundred eighty-eight thousand, five hundred nine".