77387272 has 32 divisors (see below), whose sum is σ = 154946880. Its totient is φ = 36146880.

The previous prime is 77387267. The next prime is 77387293. The reversal of 77387272 is 27278377.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (43).

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 7 ways as a sum of consecutive naturals, for example, 3022 + ... + 12802.

It is an arithmetic number, because the mean of its divisors is an integer number (4842090).

Almost surely, 2^77387272 is an apocalyptic number.

It is an amenable number.

77387272 is an abundant number, since it is smaller than the sum of its proper divisors (77559608).

77387272 is a wasteful number, since it uses less digits than its factorization.

77387272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9853 (or 9849 counting only the distinct ones).

The product of its digits is 230496, while the sum is 43.

The square root of 77387272 is about 8797.0035807654. The cubic root of 77387272 is about 426.1441319106.

The spelling of 77387272 in words is "seventy-seven million, three hundred eighty-seven thousand, two hundred seventy-two".