45384781 has 12 divisors (see below), whose sum is σ = 52038612. Its totient is φ = 39426816.

The previous prime is 45384769. The next prime is 45384809. The reversal of 45384781 is 18748354.

It can be written as a sum of positive squares in 6 ways, for example, as 695556 + 44689225 = 834^2 + 6685^2 .

It is not a de Polignac number, because 45384781 - 2¹³ = 45376589 is a prime.

It is a super-2 number, since 2×45384781² = 4119556692835922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45384701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5026 + ... + 10771.

It is an arithmetic number, because the mean of its divisors is an integer number (4336551).

Almost surely, 2^45384781 is an apocalyptic number.

It is an amenable number.

45384781 is a deficient number, since it is larger than the sum of its proper divisors (6653831).

45384781 is a wasteful number, since it uses less digits than its factorization.

45384781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15840 (or 15827 counting only the distinct ones).

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

The square root of 45384781 is about 6736.8227674476. The cubic root of 45384781 is about 356.7002508142.

The spelling of 45384781 in words is "forty-five million, three hundred eighty-four thousand, seven hundred eighty-one".