45438028 has 24 divisors (see below), whose sum is σ = 80607744. Its totient is φ = 22410000.

The previous prime is 45438017. The next prime is 45438031. The reversal of 45438028 is 82083454.

It is a super-2 number, since 2×45438028² = 4129228777057568, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 45437984 and 45438002.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167533 + ... + 167803.

It is an arithmetic number, because the mean of its divisors is an integer number (3358656).

Almost surely, 2^45438028 is an apocalyptic number.

It is an amenable number.

45438028 is a deficient number, since it is larger than the sum of its proper divisors (35169716).

45438028 is a wasteful number, since it uses less digits than its factorization.

45438028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693 (or 691 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 34.

The square root of 45438028 is about 6740.7735461147. The cubic root of 45438028 is about 356.8396939993.

The spelling of 45438028 in words is "forty-five million, four hundred thirty-eight thousand, twenty-eight".