45472778 has 16 divisors (see below), whose sum is σ = 75442920. Its totient is φ = 20419776.

The previous prime is 45472769. The next prime is 45472787. The reversal of 45472778 is 87727454.

45472778 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 (45472769) and next prime (45472787).

It can be written as a sum of positive squares in 4 ways, for example, as 26697889 + 18774889 = 5167^2 + 4333^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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, 22673 + ... + 24596.

Almost surely, 2^45472778 is an apocalyptic number.

45472778 is a deficient number, since it is larger than the sum of its proper divisors (29970142).

45472778 is a wasteful number, since it uses less digits than its factorization.

45472778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47321.

The product of its digits is 439040, while the sum is 44.

The square root of 45472778 is about 6743.3506508263. The cubic root of 45472778 is about 356.9306385240.

The spelling of 45472778 in words is "forty-five million, four hundred seventy-two thousand, seven hundred seventy-eight".