77528030 has 8 divisors (see below), whose sum is σ = 139550472. Its totient is φ = 31011208.

The previous prime is 77528023. The next prime is 77528053. The reversal of 77528030 is 3082577.

77528030 = 4401² + 4402² + ... + 4404².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3876392 + ... + 3876411.

It is an arithmetic number, because the mean of its divisors is an integer number (17443809).

Almost surely, 2^77528030 is an apocalyptic number.

77528030 is a deficient number, since it is larger than the sum of its proper divisors (62022442).

77528030 is a wasteful number, since it uses less digits than its factorization.

77528030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7752810.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 77528030 is about 8805.0002839296. Note that the first 3 decimals coincide. The cubic root of 77528030 is about 426.4023434722.

The spelling of 77528030 in words is "seventy-seven million, five hundred twenty-eight thousand, thirty".