45040090 has 8 divisors (see below), whose sum is σ = 81072180. Its totient is φ = 18016032.

The previous prime is 45040081. The next prime is 45040097. The reversal of 45040090 is 9004054.

It can be written as a sum of positive squares in 2 ways, for example, as 39275289 + 5764801 = 6267^2 + 2401^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (45040097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2251995 + ... + 2252014.

Almost surely, 2^45040090 is an apocalyptic number.

45040090 is a deficient number, since it is larger than the sum of its proper divisors (36032090).

45040090 is a wasteful number, since it uses less digits than its factorization.

45040090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4504016.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 45040090 is about 6711.1913994462. The cubic root of 45040090 is about 355.7949256548.

The spelling of 45040090 in words is "forty-five million, forty thousand, ninety".