45781090 has 32 divisors (see below), whose sum is σ = 84213360. Its totient is φ = 17915904.

The previous prime is 45781081. The next prime is 45781091. The reversal of 45781090 is 9018754.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 13256881 + 32524209 = 3641^2 + 5703^2 .

It is not an unprimeable number, because it can be changed into a prime (45781091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105514 + ... + 105946.

Almost surely, 2^45781090 is an apocalyptic number.

45781090 is a deficient number, since it is larger than the sum of its proper divisors (38432270).

45781090 is a wasteful number, since it uses less digits than its factorization.

45781090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646.

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

The square root of 45781090 is about 6766.1724778489. The cubic root of 45781090 is about 357.7355026443.

The spelling of 45781090 in words is "forty-five million, seven hundred eighty-one thousand, ninety".