49966638 has 16 divisors (see below), whose sum is σ = 105811920. Its totient is φ = 15675776.

The previous prime is 49966633. The next prime is 49966667. The reversal of 49966638 is 83666994.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49966633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244833 + ... + 245036.

It is an arithmetic number, because the mean of its divisors is an integer number (6613245).

Almost surely, 2^49966638 is an apocalyptic number.

49966638 is an abundant number, since it is smaller than the sum of its proper divisors (55845282).

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

49966638 is a wasteful number, since it uses less digits than its factorization.

49966638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489891.

The product of its digits is 1679616, while the sum is 51.

The square root of 49966638 is about 7068.7083685777. The cubic root of 49966638 is about 368.3211938607.

The spelling of 49966638 in words is "forty-nine million, nine hundred sixty-six thousand, six hundred thirty-eight".