45728550 has 120 divisors (see below), whose sum is σ = 145298736. Its totient is φ = 10445760.

The previous prime is 45728533. The next prime is 45728561. The reversal of 45728550 is 5582754.

It is a happy number.

45728550 is a `hidden beast` number, since 4 + 572 + 85 + 5 + 0 = 666.

45728550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×45728550² = 4182200570205000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 27544 + ... + 29156.

Almost surely, 2^45728550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45728550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72649368).

45728550 is an abundant number, since it is smaller than the sum of its proper divisors (99570186).

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

45728550 is a wasteful number, since it uses less digits than its factorization.

45728550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644 (or 1630 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The square root of 45728550 is about 6762.2888137080. The cubic root of 45728550 is about 357.5986002828.

The spelling of 45728550 in words is "forty-five million, seven hundred twenty-eight thousand, five hundred fifty".