45991418 has 16 divisors (see below), whose sum is σ = 75540384. Its totient is φ = 20826960.

The previous prime is 45991411. The next prime is 45991433. The reversal of 45991418 is 81419954.

It is not an unprimeable number, because it can be changed into a prime (45991411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2321 + ... + 9867.

It is an arithmetic number, because the mean of its divisors is an integer number (4721274).

Almost surely, 2^45991418 is an apocalyptic number.

45991418 is a deficient number, since it is larger than the sum of its proper divisors (29548966).

45991418 is a wasteful number, since it uses less digits than its factorization.

45991418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7837.

The product of its digits is 51840, while the sum is 41.

The square root of 45991418 is about 6781.6972801799. The cubic root of 45991418 is about 358.2825033122.

The spelling of 45991418 in words is "forty-five million, nine hundred ninety-one thousand, four hundred eighteen".