77802130 has 32 divisors (see below), whose sum is σ = 160360704. Its totient is φ = 26623296.

The previous prime is 77802091. The next prime is 77802139. The reversal of 77802130 is 3120877.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (77802139) 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 15 ways as a sum of consecutive naturals, for example, 59059 + ... + 60361.

It is an arithmetic number, because the mean of its divisors is an integer number (5011272).

Almost surely, 2^77802130 is an apocalyptic number.

77802130 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

77802130 is an abundant number, since it is smaller than the sum of its proper divisors (82558574).

77802130 is a wasteful number, since it uses less digits than its factorization.

With its successor (77802131) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (2170).

77802130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2170.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 77802130 is about 8820.5515700550. The cubic root of 77802130 is about 426.9042669401.

The spelling of 77802130 in words is "seventy-seven million, eight hundred two thousand, one hundred thirty".