49887978 has 40 divisors (see below), whose sum is σ = 116431968. Its totient is φ = 14249592.

The previous prime is 49887953. The next prime is 49888019. The reversal of 49887978 is 87978894.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12675 + ... + 16137.

Almost surely, 2^49887978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49887978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58215984).

49887978 is an abundant number, since it is smaller than the sum of its proper divisors (66543990).

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

49887978 is an equidigital number, since it uses as much as digits as its factorization.

49887978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3496 (or 3475 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 60.

The square root of 49887978 is about 7063.1422185880. The cubic root of 49887978 is about 368.1278157540.

The spelling of 49887978 in words is "forty-nine million, eight hundred eighty-seven thousand, nine hundred seventy-eight".