49781893 has 24 divisors (see below), whose sum is σ = 61129080. Its totient is φ = 40360320.

The previous prime is 49781833. The next prime is 49781903. The reversal of 49781893 is 39818794.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 19509889 + 30272004 = 4417^2 + 5502^2 .

It is not a de Polignac number, because 49781893 - 2²⁵ = 16227461 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49781803) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74983 + ... + 75643.

It is an arithmetic number, because the mean of its divisors is an integer number (2547045).

Almost surely, 2^49781893 is an apocalyptic number.

It is an amenable number.

49781893 is a deficient number, since it is larger than the sum of its proper divisors (11347187).

49781893 is a wasteful number, since it uses less digits than its factorization.

49781893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757 (or 750 counting only the distinct ones).

The product of its digits is 435456, while the sum is 49.

The square root of 49781893 is about 7055.6284624405. The cubic root of 49781893 is about 367.8666937019.

The spelling of 49781893 in words is "forty-nine million, seven hundred eighty-one thousand, eight hundred ninety-three".