77242130 has 24 divisors (see below), whose sum is σ = 161736588. Its totient is φ = 26482848.

The previous prime is 77242129. The next prime is 77242141. The reversal of 77242130 is 3124277.

It can be written as a sum of positive squares in 2 ways, for example, as 74252689 + 2989441 = 8617^2 + 1729^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 77242130.

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 11 ways as a sum of consecutive naturals, for example, 78329 + ... + 79308.

Almost surely, 2^77242130 is an apocalyptic number.

77242130 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

77242130 is an abundant number, since it is smaller than the sum of its proper divisors (84494458).

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

77242130 is a wasteful number, since it uses less digits than its factorization.

77242130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157658 (or 157651 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 77242130 is about 8788.7501955625. The cubic root of 77242130 is about 425.8775500884.

The spelling of 77242130 in words is "seventy-seven million, two hundred forty-two thousand, one hundred thirty".