49988197440 has 280 divisors, whose sum is σ = 187177436160. Its totient is φ = 12628472832.

The previous prime is 49988197439. The next prime is 49988197471. The reversal of 49988197440 is 4479188994.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 441729 + ... + 543231.

Almost surely, 2^49988197440 is an apocalyptic number.

49988197440 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 49988197440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93588718080).

49988197440 is an abundant number, since it is smaller than the sum of its proper divisors (137189238720).

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

49988197440 is a wasteful number, since it uses less digits than its factorization.

49988197440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101551 (or 101532 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 63.

The spelling of 49988197440 in words is "forty-nine billion, nine hundred eighty-eight million, one hundred ninety-seven thousand, four hundred forty".