49405391 has 8 divisors (see below), whose sum is σ = 56636544. Its totient is φ = 42217560.

The previous prime is 49405379. The next prime is 49405393. The reversal of 49405391 is 19350494.

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

It is a de Polignac number, because none of the positive numbers 2^k-49405391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49405393) 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, 8345 + ... + 12978.

It is an arithmetic number, because the mean of its divisors is an integer number (7079568).

Almost surely, 2^49405391 is an apocalyptic number.

49405391 is a deficient number, since it is larger than the sum of its proper divisors (7231153).

49405391 is a wasteful number, since it uses less digits than its factorization.

49405391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21661.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 49405391 is about 7028.8968551260. The cubic root of 49405391 is about 366.9369501183.

The spelling of 49405391 in words is "forty-nine million, four hundred five thousand, three hundred ninety-one".