77868370 has 16 divisors (see below), whose sum is σ = 142084440. Its totient is φ = 30720384.

The previous prime is 77868353. The next prime is 77868379. The reversal of 77868370 is 7386877.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 47320641 + 30547729 = 6879^2 + 5527^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 77868370.

It is not an unprimeable number, because it can be changed into a prime (77868379) by changing a digit.

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, 52605 + ... + 54064.

Almost surely, 2^77868370 is an apocalyptic number.

77868370 is a deficient number, since it is larger than the sum of its proper divisors (64216070).

77868370 is a wasteful number, since it uses less digits than its factorization.

77868370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106749.

The product of its (nonzero) digits is 395136, while the sum is 46.

The square root of 77868370 is about 8824.3056384058. The cubic root of 77868370 is about 427.0253866626.

The spelling of 77868370 in words is "seventy-seven million, eight hundred sixty-eight thousand, three hundred seventy".