45378945 has 12 divisors (see below), whose sum is σ = 78656916. Its totient is φ = 24202080.

The previous prime is 45378941. The next prime is 45378953. The reversal of 45378945 is 54987354.

It can be written as a sum of positive squares in 2 ways, for example, as 8071281 + 37307664 = 2841^2 + 6108^2 .

It is not a de Polignac number, because 45378945 - 2² = 45378941 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1008421 = 45378945 / (4 + 5 + 3 + 7 + 8 + 9 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 45378945.

It is not an unprimeable number, because it can be changed into a prime (45378941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 504166 + ... + 504255.

It is an arithmetic number, because the mean of its divisors is an integer number (6554743).

Almost surely, 2^45378945 is an apocalyptic number.

45378945 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

45378945 is a deficient number, since it is larger than the sum of its proper divisors (33277971).

45378945 is a wasteful number, since it uses less digits than its factorization.

45378945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008432 (or 1008429 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 45378945 is about 6736.3896116540. The cubic root of 45378945 is about 356.6849608730.

The spelling of 45378945 in words is "forty-five million, three hundred seventy-eight thousand, nine hundred forty-five".