49628581 has 4 divisors (see below), whose sum is σ = 50969932. Its totient is φ = 48287232.

The previous prime is 49628561. The next prime is 49628587. The reversal of 49628581 is 18582694.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45360225 + 4268356 = 6735^2 + 2066^2 .

It is a cyclic number.

It is not a de Polignac number, because 49628581 - 2⁹ = 49628069 is a prime.

It is a super-2 number, since 2×49628581² = 4925992104147122, 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 (49628587) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 670620 + ... + 670693.

It is an arithmetic number, because the mean of its divisors is an integer number (12742483).

Almost surely, 2^49628581 is an apocalyptic number.

It is an amenable number.

49628581 is a deficient number, since it is larger than the sum of its proper divisors (1341351).

49628581 is a wasteful number, since it uses less digits than its factorization.

49628581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341350.

The product of its digits is 138240, while the sum is 43.

The square root of 49628581 is about 7044.7555670868. The cubic root of 49628581 is about 367.4886688780.

The spelling of 49628581 in words is "forty-nine million, six hundred twenty-eight thousand, five hundred eighty-one".