77350728 has 128 divisors (see below), whose sum is σ = 240952320. Its totient is φ = 20148480.

The previous prime is 77350709. The next prime is 77350753. The reversal of 77350728 is 82705377.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 233523 + ... + 233853.

It is an arithmetic number, because the mean of its divisors is an integer number (1882440).

Almost surely, 2^77350728 is an apocalyptic number.

77350728 is a gapful number since it is divisible by the number (78) 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 77350728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120476160).

77350728 is an abundant number, since it is smaller than the sum of its proper divisors (163601592).

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

77350728 is a wasteful number, since it uses less digits than its factorization.

77350728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467 (or 463 counting only the distinct ones).

The product of its (nonzero) digits is 82320, while the sum is 39.

The square root of 77350728 is about 8794.9262646142. The cubic root of 77350728 is about 426.0770430871.

The spelling of 77350728 in words is "seventy-seven million, three hundred fifty thousand, seven hundred twenty-eight".