49403781 has 48 divisors (see below), whose sum is σ = 86736000. Its totient is φ = 26469504.

The previous prime is 49403771. The next prime is 49403789. The reversal of 49403781 is 18730494.

It is a happy number.

It is not a de Polignac number, because 49403781 - 2¹¹ = 49401733 is a prime.

It is a super-2 number, since 2×49403781² = 4881467154191922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49403789) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 178215 + ... + 178491.

It is an arithmetic number, because the mean of its divisors is an integer number (1807000).

Almost surely, 2^49403781 is an apocalyptic number.

It is an amenable number.

49403781 is a deficient number, since it is larger than the sum of its proper divisors (37332219).

49403781 is a wasteful number, since it uses less digits than its factorization.

49403781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458 (or 455 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 49403781 is about 7028.7823269753. The cubic root of 49403781 is about 366.9329642179.

The spelling of 49403781 in words is "forty-nine million, four hundred three thousand, seven hundred eighty-one".