4538781 has 32 divisors (see below), whose sum is σ = 7387520. Its totient is φ = 2737152.

The previous prime is 4538771. The next prime is 4538791. The reversal of 4538781 is 1878354.

It is an interprime number because it is at equal distance from previous prime (4538771) and next prime (4538791).

It is not a de Polignac number, because 4538781 - 2⁵ = 4538749 is a prime.

It is a super-2 number, since 2×4538781² = 41201065931922, which contains 22 as substring.

It is a Duffinian number.

4538781 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4538731) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23421 + ... + 23613.

It is an arithmetic number, because the mean of its divisors is an integer number (230860).

Almost surely, 2^4538781 is an apocalyptic number.

It is an amenable number.

4538781 is a deficient number, since it is larger than the sum of its proper divisors (2848739).

4538781 is a wasteful number, since it uses less digits than its factorization.

4538781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282 (or 276 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 4538781 is about 2130.4415035386. The cubic root of 4538781 is about 165.5692733371.

It can be divided in two parts, 453 and 8781, that multiplied together give a palindrome (3977793).

The spelling of 4538781 in words is "four million, five hundred thirty-eight thousand, seven hundred eighty-one".