32781940 has 12 divisors (see below), whose sum is σ = 68842116. Its totient is φ = 13112768.

The previous prime is 32781893. The next prime is 32781941. The reversal of 32781940 is 4918723.

It can be written as a sum of positive squares in 2 ways, for example, as 6280036 + 26501904 = 2506^2 + 5148^2 .

It is a junction number, because it is equal to n+sod(n) for n = 32781896 and 32781905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32781941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 819529 + ... + 819568.

It is an arithmetic number, because the mean of its divisors is an integer number (5736843).

Almost surely, 2^32781940 is an apocalyptic number.

It is an amenable number.

32781940 is an abundant number, since it is smaller than the sum of its proper divisors (36060176).

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

32781940 is a wasteful number, since it uses less digits than its factorization.

32781940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1639106 (or 1639104 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 32781940 is about 5725.5515018206. The cubic root of 32781940 is about 320.0453711709.

The spelling of 32781940 in words is "thirty-two million, seven hundred eighty-one thousand, nine hundred forty".