49779990 has 96 divisors (see below), whose sum is σ = 140789376. Its totient is φ = 12130560.

The previous prime is 49779967. The next prime is 49780001. The reversal of 49779990 is 9997794.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 183555 + ... + 183825.

It is an arithmetic number, because the mean of its divisors is an integer number (1466556).

Almost surely, 2^49779990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49779990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70394688).

49779990 is an abundant number, since it is smaller than the sum of its proper divisors (91009386).

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

49779990 is a wasteful number, since it uses less digits than its factorization.

49779990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454 (or 451 counting only the distinct ones).

The product of its (nonzero) digits is 1285956, while the sum is 54.

The square root of 49779990 is about 7055.4936042774. The cubic root of 49779990 is about 367.8620061927.

The spelling of 49779990 in words is "forty-nine million, seven hundred seventy-nine thousand, nine hundred ninety".