45891890 has 32 divisors (see below), whose sum is σ = 91272960. Its totient is φ = 16473600.

The previous prime is 45891889. The next prime is 45891893. The reversal of 45891890 is 9819854.

It is not an unprimeable number, because it can be changed into a prime (45891893) 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, 6050 + ... + 11330.

It is an arithmetic number, because the mean of its divisors is an integer number (2852280).

Almost surely, 2^45891890 is an apocalyptic number.

45891890 is a deficient number, since it is larger than the sum of its proper divisors (45381070).

45891890 is a wasteful number, since it uses less digits than its factorization.

45891890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5378.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 45891890 is about 6774.3553198810. The cubic root of 45891890 is about 358.0238688662.

Subtracting from 45891890 its reverse (9819854), we obtain a square (36072036 = 6006²).

The spelling of 45891890 in words is "forty-five million, eight hundred ninety-one thousand, eight hundred ninety".