45149778 has 16 divisors (see below), whose sum is σ = 100332960. Its totient is φ = 15049908.

The previous prime is 45149777. The next prime is 45149779. The reversal of 45149778 is 87794154.

It is a happy number.

45149778 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 (45149777) and next prime (45149779).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (45149771) 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 7 ways as a sum of consecutive naturals, for example, 418000 + ... + 418107.

It is an arithmetic number, because the mean of its divisors is an integer number (6270810).

Almost surely, 2^45149778 is an apocalyptic number.

45149778 is an abundant number, since it is smaller than the sum of its proper divisors (55183182).

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

45149778 is a wasteful number, since it uses less digits than its factorization.

45149778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836118 (or 836112 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 45149778 is about 6719.3584515190. The cubic root of 45149778 is about 356.0835188888.

The spelling of 45149778 in words is "forty-five million, one hundred forty-nine thousand, seven hundred seventy-eight".