50778728 has 128 divisors (see below), whose sum is σ = 135717120. Its totient is φ = 17141760.

The previous prime is 50778709. The next prime is 50778817. The reversal of 50778728 is 82787705.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 135950 + ... + 136322.

It is an arithmetic number, because the mean of its divisors is an integer number (1060290).

Almost surely, 2^50778728 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 50778728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67858560).

50778728 is an abundant number, since it is smaller than the sum of its proper divisors (84938392).

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

50778728 is a wasteful number, since it uses less digits than its factorization.

50778728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427 (or 423 counting only the distinct ones).

The product of its (nonzero) digits is 219520, while the sum is 44.

The square root of 50778728 is about 7125.9194494465. The cubic root of 50778728 is about 370.3058780576.

The spelling of 50778728 in words is "fifty million, seven hundred seventy-eight thousand, seven hundred twenty-eight".