45727720 has 16 divisors (see below), whose sum is σ = 102887460. Its totient is φ = 18291072.

The previous prime is 45727691. The next prime is 45727733. The reversal of 45727720 is 2772754.

It can be written as a sum of positive squares in 2 ways, for example, as 42693156 + 3034564 = 6534^2 + 1742^2 .

It is a super-3 number, since 3×45727720³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 571557 + ... + 571636.

Almost surely, 2^45727720 is an apocalyptic number.

45727720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45727720 is an abundant number, since it is smaller than the sum of its proper divisors (57159740).

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

45727720 is a wasteful number, since it uses less digits than its factorization.

45727720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1143204 (or 1143200 counting only the distinct ones).

The product of its (nonzero) digits is 27440, while the sum is 34.

The square root of 45727720 is about 6762.2274436756. The cubic root of 45727720 is about 357.5964367283.

The spelling of 45727720 in words is "forty-five million, seven hundred twenty-seven thousand, seven hundred twenty".