45019780 has 48 divisors (see below), whose sum is σ = 102312000. Its totient is φ = 16541568.

The previous prime is 45019747. The next prime is 45019789. The reversal of 45019780 is 8791054.

It is a happy number.

45019780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (45019789) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 89971 + ... + 90469.

It is an arithmetic number, because the mean of its divisors is an integer number (2131500).

Almost surely, 2^45019780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45019780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51156000).

45019780 is an abundant number, since it is smaller than the sum of its proper divisors (57292220).

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

45019780 is a wasteful number, since it uses less digits than its factorization.

45019780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868 (or 866 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 45019780 is about 6709.6780846774. The cubic root of 45019780 is about 355.7414378888.

The spelling of 45019780 in words is "forty-five million, nineteen thousand, seven hundred eighty".