77880030 has 16 divisors (see below), whose sum is σ = 186912144. Its totient is φ = 20768000.

The previous prime is 77880013. The next prime is 77880053. The reversal of 77880030 is 3008877.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 77879973 and 77880000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1297971 + ... + 1298030.

It is an arithmetic number, because the mean of its divisors is an integer number (11682009).

Almost surely, 2^77880030 is an apocalyptic number.

77880030 is an abundant number, since it is smaller than the sum of its proper divisors (109032114).

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

77880030 is a wasteful number, since it uses less digits than its factorization.

77880030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2596011.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 77880030 is about 8824.9662888875. The cubic root of 77880030 is about 427.0466998415.

It can be divided in two parts, 778 and 80030, that added together give a palindrome (80808).

The spelling of 77880030 in words is "seventy-seven million, eight hundred eighty thousand, thirty".