45727780 has 72 divisors (see below), whose sum is σ = 115630200. Its totient is φ = 15128064.

The previous prime is 45727741. The next prime is 45727793. The reversal of 45727780 is 8772754.

It can be written as a sum of positive squares in 4 ways, for example, as 16826404 + 28901376 = 4102^2 + 5376^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27616 + ... + 29224.

It is an arithmetic number, because the mean of its divisors is an integer number (1605975).

Almost surely, 2^45727780 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 45727780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57815100).

45727780 is an abundant number, since it is smaller than the sum of its proper divisors (69902420).

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

45727780 is a wasteful number, since it uses less digits than its factorization.

45727780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661 (or 1652 counting only the distinct ones).

The product of its (nonzero) digits is 109760, while the sum is 40.

The square root of 45727780 is about 6762.2318800822. The cubic root of 45727780 is about 357.5965931307.

The spelling of 45727780 in words is "forty-five million, seven hundred twenty-seven thousand, seven hundred eighty".