45478381 has 16 divisors (see below), whose sum is σ = 52093440. Its totient is φ = 39355200.

The previous prime is 45478357. The next prime is 45478393. The reversal of 45478381 is 18387454.

It is a cyclic number.

It is not a de Polignac number, because 45478381 - 2¹⁹ = 44954093 is a prime.

It is a super-2 number, since 2×45478381² = 4136566276762322, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45478481) 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 15 ways as a sum of consecutive naturals, for example, 24036 + ... + 25858.

It is an arithmetic number, because the mean of its divisors is an integer number (3255840).

Almost surely, 2^45478381 is an apocalyptic number.

It is an amenable number.

45478381 is a deficient number, since it is larger than the sum of its proper divisors (6615059).

45478381 is a wasteful number, since it uses less digits than its factorization.

45478381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1956.

The product of its digits is 107520, while the sum is 40.

The square root of 45478381 is about 6743.7660843182. The cubic root of 45478381 is about 356.9452978456.

The spelling of 45478381 in words is "forty-five million, four hundred seventy-eight thousand, three hundred eighty-one".