77052020 has 12 divisors (see below), whose sum is σ = 161809284. Its totient is φ = 30820800.

The previous prime is 77051999. The next prime is 77052029. The reversal of 77052020 is 2025077.

It can be written as a sum of positive squares in 2 ways, for example, as 34175716 + 42876304 = 5846^2 + 6548^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77052029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1926281 + ... + 1926320.

It is an arithmetic number, because the mean of its divisors is an integer number (13484107).

Almost surely, 2^77052020 is an apocalyptic number.

It is an amenable number.

77052020 is an abundant number, since it is smaller than the sum of its proper divisors (84757264).

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

77052020 is a wasteful number, since it uses less digits than its factorization.

77052020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3852610 (or 3852608 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 23.

The square root of 77052020 is about 8777.9280015275. The cubic root of 77052020 is about 425.5278700406.

Adding to 77052020 its reverse (2025077), we get a palindrome (79077097).

The spelling of 77052020 in words is "seventy-seven million, fifty-two thousand, twenty".