36181780 has 24 divisors (see below), whose sum is σ = 80452008. Its totient is φ = 13621248.

The previous prime is 36181777. The next prime is 36181781. The reversal of 36181780 is 8718163.

36181780 is nontrivially palindromic in base 9.

It can be written as a sum of positive squares in 4 ways, for example, as 11916304 + 24265476 = 3452^2 + 4926^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36181781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52869 + ... + 53548.

It is an arithmetic number, because the mean of its divisors is an integer number (3352167).

Almost surely, 2^36181780 is an apocalyptic number.

It is an amenable number.

36181780 is an abundant number, since it is smaller than the sum of its proper divisors (44270228).

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

36181780 is a wasteful number, since it uses less digits than its factorization.

36181780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106443 (or 106441 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 36181780 is about 6015.1292587940. The cubic root of 36181780 is about 330.7475553463.

The spelling of 36181780 in words is "thirty-six million, one hundred eighty-one thousand, seven hundred eighty".