45781236 has 18 divisors (see below), whose sum is σ = 115724882. Its totient is φ = 15260400.

The previous prime is 45781217. The next prime is 45781249. The reversal of 45781236 is 63218754.

45781236 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 44355600 + 1425636 = 6660^2 + 1194^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1271701 = 45781236 / (4 + 5 + 7 + 8 + 1 + 2 + 3 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 45781236.

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 5 ways as a sum of consecutive naturals, for example, 635815 + ... + 635886.

Almost surely, 2^45781236 is an apocalyptic number.

It is an amenable number.

45781236 is an abundant number, since it is smaller than the sum of its proper divisors (69943646).

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

45781236 is a wasteful number, since it uses less digits than its factorization.

45781236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271711 (or 1271706 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 45781236 is about 6766.1832668056. The cubic root of 45781236 is about 357.7358829274.

The spelling of 45781236 in words is "forty-five million, seven hundred eighty-one thousand, two hundred thirty-six".