49709940 has 96 divisors (see below), whose sum is σ = 161409024. Its totient is φ = 11195520.

The previous prime is 49709939. The next prime is 49709951. The reversal of 49709940 is 4990794.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 49709892 and 49709901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28987 + ... + 30653.

It is an arithmetic number, because the mean of its divisors is an integer number (1681344).

Almost surely, 2^49709940 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49709940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80704512).

49709940 is an abundant number, since it is smaller than the sum of its proper divisors (111699084).

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

49709940 is a wasteful number, since it uses less digits than its factorization.

49709940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1757 (or 1755 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 49709940 is about 7050.5276398295. The cubic root of 49709940 is about 367.6893743771.

The spelling of 49709940 in words is "forty-nine million, seven hundred nine thousand, nine hundred forty".