86780780 has 24 divisors (see below), whose sum is σ = 188119680. Its totient is φ = 33592320.

The previous prime is 86780777. The next prime is 86780783. The reversal of 86780780 is 8708768.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (86780777) and next prime (86780783).

It is not an unprimeable number, because it can be changed into a prime (86780783) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 69365 + ... + 70604.

It is an arithmetic number, because the mean of its divisors is an integer number (7838320).

Almost surely, 2^86780780 is an apocalyptic number.

It is an amenable number.

86780780 is an abundant number, since it is smaller than the sum of its proper divisors (101338900).

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

86780780 is a wasteful number, since it uses less digits than its factorization.

86780780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140009 (or 140007 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 44.

The square root of 86780780 is about 9315.6202155305. The cubic root of 86780780 is about 442.7322750875.

The spelling of 86780780 in words is "eighty-six million, seven hundred eighty thousand, seven hundred eighty".