49781438 has 16 divisors (see below), whose sum is σ = 86300640. Its totient is φ = 21094656.

The previous prime is 49781419. The next prime is 49781447. The reversal of 49781438 is 83418794.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18731 + ... + 21222.

It is an arithmetic number, because the mean of its divisors is an integer number (5393790).

Almost surely, 2^49781438 is an apocalyptic number.

49781438 is a deficient number, since it is larger than the sum of its proper divisors (36519202).

49781438 is a wasteful number, since it uses less digits than its factorization.

49781438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40051.

The product of its digits is 193536, while the sum is 44.

The square root of 49781438 is about 7055.5962186055. The cubic root of 49781438 is about 367.8655729473.

The spelling of 49781438 in words is "forty-nine million, seven hundred eighty-one thousand, four hundred thirty-eight".