45194890 has 32 divisors (see below), whose sum is σ = 88099200. Its totient is φ = 16593984.

The previous prime is 45194887. The next prime is 45194893. The reversal of 45194890 is 9849154.

45194890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (45194887) and next prime (45194893).

It is a super-2 number, since 2×45194890² = 4085156164224200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (45194893) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 24997 + ... + 26743.

It is an arithmetic number, because the mean of its divisors is an integer number (2753100).

Almost surely, 2^45194890 is an apocalyptic number.

45194890 is a deficient number, since it is larger than the sum of its proper divisors (42904310).

45194890 is a wasteful number, since it uses less digits than its factorization.

45194890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1966.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 45194890 is about 6722.7144815171. The cubic root of 45194890 is about 356.2020746036.

It can be divided in two parts, 4519 and 4890, that added together give a square (9409 = 97²).

The spelling of 45194890 in words is "forty-five million, one hundred ninety-four thousand, eight hundred ninety".