49361638 has 4 divisors (see below), whose sum is σ = 74042460. Its totient is φ = 24680818.

The previous prime is 49361633. The next prime is 49361687. The reversal of 49361638 is 83616394.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83616394 = 2 ⋅41808197.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 49361638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49361633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12340408 + ... + 12340411.

It is an arithmetic number, because the mean of its divisors is an integer number (18510615).

Almost surely, 2^49361638 is an apocalyptic number.

49361638 is a deficient number, since it is larger than the sum of its proper divisors (24680822).

49361638 is a wasteful number, since it uses less digits than its factorization.

49361638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24680821.

The product of its digits is 93312, while the sum is 40.

The square root of 49361638 is about 7025.7837996910. The cubic root of 49361638 is about 366.8285993651.

The spelling of 49361638 in words is "forty-nine million, three hundred sixty-one thousand, six hundred thirty-eight".