77462020 has 12 divisors (see below), whose sum is σ = 162670284. Its totient is φ = 30984800.

The previous prime is 77461981. The next prime is 77462039. The reversal of 77462020 is 2026477.

It can be written as a sum of positive squares in 2 ways, for example, as 54287424 + 23174596 = 7368^2 + 4814^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 77462020.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1936531 + ... + 1936570.

It is an arithmetic number, because the mean of its divisors is an integer number (13555857).

Almost surely, 2^77462020 is an apocalyptic number.

It is an amenable number.

77462020 is an abundant number, since it is smaller than the sum of its proper divisors (85208264).

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

77462020 is a wasteful number, since it uses less digits than its factorization.

77462020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3873110 (or 3873108 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 77462020 is about 8801.2510474364. The cubic root of 77462020 is about 426.2812912934.

Adding to 77462020 its reverse (2026477), we get a palindrome (79488497).

The spelling of 77462020 in words is "seventy-seven million, four hundred sixty-two thousand, twenty".