45000028 has 6 divisors (see below), whose sum is σ = 78750056. Its totient is φ = 22500012.

The previous prime is 45000023. The next prime is 45000031. The reversal of 45000028 is 82000054.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 44999969 and 45000014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45000023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5625000 + ... + 5625007.

Almost surely, 2^45000028 is an apocalyptic number.

It is an amenable number.

45000028 is a deficient number, since it is larger than the sum of its proper divisors (33750028).

45000028 is a wasteful number, since it uses less digits than its factorization.

45000028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11250011 (or 11250009 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 45000028 is about 6708.2060194958. The cubic root of 45000028 is about 355.6894042216.

The spelling of 45000028 in words is "forty-five million, twenty-eight", and thus it is an aban number and an uban number.