77738028 has 24 divisors (see below), whose sum is σ = 181570032. Its totient is φ = 25886784.

The previous prime is 77738021. The next prime is 77738033. The reversal of 77738028 is 82083777.

It is not an unprimeable number, because it can be changed into a prime (77738021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12226 + ... + 17462.

It is an arithmetic number, because the mean of its divisors is an integer number (7565418).

Almost surely, 2^77738028 is an apocalyptic number.

It is an amenable number.

77738028 is an abundant number, since it is smaller than the sum of its proper divisors (103832004).

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

77738028 is a wasteful number, since it uses less digits than its factorization.

77738028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6481 (or 6479 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 42.

The square root of 77738028 is about 8816.9171483008. The cubic root of 77738028 is about 426.7869910749.

The spelling of 77738028 in words is "seventy-seven million, seven hundred thirty-eight thousand, twenty-eight".