49257940 has 24 divisors (see below), whose sum is σ = 104607720. Its totient is φ = 19481088.

The previous prime is 49257907. The next prime is 49257947. The reversal of 49257940 is 4975294.

It can be written as a sum of positive squares in 4 ways, for example, as 1758276 + 47499664 = 1326^2 + 6892^2 .

It is a junction number, because it is equal to n+sod(n) for n = 49257893 and 49257902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49257947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12057 + ... + 15616.

It is an arithmetic number, because the mean of its divisors is an integer number (4358655).

Almost surely, 2^49257940 is an apocalyptic number.

It is an amenable number.

49257940 is an abundant number, since it is smaller than the sum of its proper divisors (55349780).

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

49257940 is a wasteful number, since it uses less digits than its factorization.

49257940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27771 (or 27769 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 49257940 is about 7018.4001025875. The cubic root of 49257940 is about 366.5715437361.

The spelling of 49257940 in words is "forty-nine million, two hundred fifty-seven thousand, nine hundred forty".