45787728 has 40 divisors (see below), whose sum is σ = 135183808. Its totient is φ = 13082112.

The previous prime is 45787727. The next prime is 45787747. The reversal of 45787728 is 82778754.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45787727) 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, 67801 + ... + 68472.

Almost surely, 2^45787728 is an apocalyptic number.

45787728 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

45787728 is an abundant number, since it is smaller than the sum of its proper divisors (89396080).

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

45787728 is a wasteful number, since it uses less digits than its factorization.

45787728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136291 (or 136285 counting only the distinct ones).

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

The square root of 45787728 is about 6766.6629885047. The cubic root of 45787728 is about 357.7527916858.

The spelling of 45787728 in words is "forty-five million, seven hundred eighty-seven thousand, seven hundred twenty-eight".