77652020 has 12 divisors (see below), whose sum is σ = 163069284. Its totient is φ = 31060800.

The previous prime is 77652017. The next prime is 77652041. The reversal of 77652020 is 2025677.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28174864 + 49477156 = 5308^2 + 7034^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1941281 + ... + 1941320.

It is an arithmetic number, because the mean of its divisors is an integer number (13589107).

Almost surely, 2^77652020 is an apocalyptic number.

It is an amenable number.

77652020 is an abundant number, since it is smaller than the sum of its proper divisors (85417264).

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

77652020 is a wasteful number, since it uses less digits than its factorization.

77652020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3882610 (or 3882608 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 77652020 is about 8812.0383567027. The cubic root of 77652020 is about 426.6295364282.

Adding to 77652020 its reverse (2025677), we get a palindrome (79677697).

The spelling of 77652020 in words is "seventy-seven million, six hundred fifty-two thousand, twenty".