45728639 has 8 divisors (see below), whose sum is σ = 50631168. Its totient is φ = 40950360.

The previous prime is 45728591. The next prime is 45728677. The reversal of 45728639 is 93682754.

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

It is not a de Polignac number, because 45728639 - 2¹⁶ = 45663103 is a prime.

It is a super-2 number, since 2×45728639² = 4182216849584642, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45728639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45728699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30287 + ... + 31760.

It is an arithmetic number, because the mean of its divisors is an integer number (6328896).

Almost surely, 2^45728639 is an apocalyptic number.

45728639 is a deficient number, since it is larger than the sum of its proper divisors (4902529).

45728639 is a wasteful number, since it uses less digits than its factorization.

45728639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62125.

The product of its digits is 362880, while the sum is 44.

The square root of 45728639 is about 6762.2953943169. The cubic root of 45728639 is about 357.5988322768.

The spelling of 45728639 in words is "forty-five million, seven hundred twenty-eight thousand, six hundred thirty-nine".