45778728 has 16 divisors (see below), whose sum is σ = 114446880. Its totient is φ = 15259568.

The previous prime is 45778699. The next prime is 45778729. The reversal of 45778728 is 82787754.

It is a happy number.

It is a super-3 number, since 3×45778728³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (45778729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 953700 + ... + 953747.

It is an arithmetic number, because the mean of its divisors is an integer number (7152930).

Almost surely, 2^45778728 is an apocalyptic number.

It is an amenable number.

45778728 is an abundant number, since it is smaller than the sum of its proper divisors (68668152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

45778728 is a wasteful number, since it uses less digits than its factorization.

45778728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1907456 (or 1907452 counting only the distinct ones).

The product of its digits is 878080, while the sum is 48.

The square root of 45778728 is about 6765.9979308303. The cubic root of 45778728 is about 357.7293502803.

The spelling of 45778728 in words is "forty-five million, seven hundred seventy-eight thousand, seven hundred twenty-eight".