36721780 has 24 divisors (see below), whose sum is σ = 77351400. Its totient is φ = 14643840.

The previous prime is 36721771. The next prime is 36721787. The reversal of 36721780 is 8712763.

It can be written as a sum of positive squares in 4 ways, for example, as 10732176 + 25989604 = 3276^2 + 5098^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36721787) 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, 4350 + ... + 9610.

It is an arithmetic number, because the mean of its divisors is an integer number (3222975).

Almost surely, 2^36721780 is an apocalyptic number.

It is an amenable number.

36721780 is an abundant number, since it is smaller than the sum of its proper divisors (40629620).

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

36721780 is a wasteful number, since it uses less digits than its factorization.

36721780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5619 (or 5617 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 36721780 is about 6059.8498331229. The cubic root of 36721780 is about 332.3848660111.

The spelling of 36721780 in words is "thirty-six million, seven hundred twenty-one thousand, seven hundred eighty".