49999040 has 224 divisors, whose sum is σ = 156691584. Its totient is φ = 14745600.

The previous prime is 49999031. The next prime is 49999069. The reversal of 49999040 is 4099994.

It is a happy number.

It is a Cunningham number, because it is equal to 7071²-1.

It is a tau number, because it is divible by the number of its divisors (224).

It is a junction number, because it is equal to n+sod(n) for n = 49998982 and 49999000.

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, 494990 + ... + 495090.

It is an arithmetic number, because the mean of its divisors is an integer number (699516).

Almost surely, 2^49999040 is an apocalyptic number.

49999040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49999040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78345792).

49999040 is an abundant number, since it is smaller than the sum of its proper divisors (106692544).

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

49999040 is a wasteful number, since it uses less digits than its factorization.

49999040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 145 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 49999040 is about 7070.9999292886. Note that the first 4 decimals coincide. The cubic root of 49999040 is about 368.4007920688.

The spelling of 49999040 in words is "forty-nine million, nine hundred ninety-nine thousand, forty".