49991438 has 8 divisors (see below), whose sum is σ = 85699632. Its totient is φ = 21424896.

The previous prime is 49991429. The next prime is 49991479. The reversal of 49991438 is 83419994.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 49991392 and 49991401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1785395 + ... + 1785422.

It is an arithmetic number, because the mean of its divisors is an integer number (10712454).

Almost surely, 2^49991438 is an apocalyptic number.

49991438 is a deficient number, since it is larger than the sum of its proper divisors (35708194).

49991438 is a wasteful number, since it uses less digits than its factorization.

49991438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3570826.

The product of its digits is 279936, while the sum is 47.

The square root of 49991438 is about 7070.4623611190. The cubic root of 49991438 is about 368.3821202118.

The spelling of 49991438 in words is "forty-nine million, nine hundred ninety-one thousand, four hundred thirty-eight".