45442090 has 8 divisors (see below), whose sum is σ = 81795780. Its totient is φ = 18176832.

The previous prime is 45442069. The next prime is 45442097. The reversal of 45442090 is 9024454.

It can be written as a sum of positive squares in 2 ways, for example, as 42263001 + 3179089 = 6501^2 + 1783^2 .

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 (45442097) 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, 2272095 + ... + 2272114.

Almost surely, 2^45442090 is an apocalyptic number.

45442090 is a deficient number, since it is larger than the sum of its proper divisors (36353690).

45442090 is a wasteful number, since it uses less digits than its factorization.

45442090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4544216.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 45442090 is about 6741.0748401127. The cubic root of 45442090 is about 356.8503270873.

The spelling of 45442090 in words is "forty-five million, four hundred forty-two thousand, ninety".