32720733 has 16 divisors (see below), whose sum is σ = 51327360. Its totient is φ = 20530368.

The previous prime is 32720713. The next prime is 32720749. The reversal of 32720733 is 33702723.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-32720733 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 32720697 and 32720706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32720713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35185 + ... + 36102.

It is an arithmetic number, because the mean of its divisors is an integer number (3207960).

Almost surely, 2^32720733 is an apocalyptic number.

It is an amenable number.

32720733 is a deficient number, since it is larger than the sum of its proper divisors (18606627).

32720733 is a wasteful number, since it uses less digits than its factorization.

32720733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71313 (or 71307 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 27.

The square root of 32720733 is about 5720.2039299312. The cubic root of 32720733 is about 319.8460620268.

The spelling of 32720733 in words is "thirty-two million, seven hundred twenty thousand, seven hundred thirty-three".