45219918 has 32 divisors (see below), whose sum is σ = 94317696. Its totient is φ = 14440608.

The previous prime is 45219913. The next prime is 45219919. The reversal of 45219918 is 81991254.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45219913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12021 + ... + 15327.

It is an arithmetic number, because the mean of its divisors is an integer number (2947428).

Almost surely, 2^45219918 is an apocalyptic number.

45219918 is an abundant number, since it is smaller than the sum of its proper divisors (49097778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

45219918 is a wasteful number, since it uses less digits than its factorization.

45219918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3408.

The product of its digits is 25920, while the sum is 39.

The square root of 45219918 is about 6724.5756743456. The cubic root of 45219918 is about 356.2678149294.

The spelling of 45219918 in words is "forty-five million, two hundred nineteen thousand, nine hundred eighteen".