49381812 has 60 divisors (see below), whose sum is σ = 129987396. Its totient is φ = 16346880.

The previous prime is 49381811. The next prime is 49381823. The reversal of 49381812 is 21818394.

It can be written as a sum of positive squares in 2 ways, for example, as 27815076 + 21566736 = 5274^2 + 4644^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49381811) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 55612 + ... + 56492.

Almost surely, 2^49381812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49381812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64993698).

49381812 is an abundant number, since it is smaller than the sum of its proper divisors (80605584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

49381812 is a wasteful number, since it uses less digits than its factorization.

49381812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070 (or 1059 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 49381812 is about 7027.2193647274. The cubic root of 49381812 is about 366.8785665901.

The spelling of 49381812 in words is "forty-nine million, three hundred eighty-one thousand, eight hundred twelve".