30732140 has 24 divisors (see below), whose sum is σ = 67344480. Its totient is φ = 11758208.

The previous prime is 30732133. The next prime is 30732151. The reversal of 30732140 is 4123703.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32945 + ... + 33864.

It is an arithmetic number, because the mean of its divisors is an integer number (2806020).

Almost surely, 2^30732140 is an apocalyptic number.

It is an amenable number.

30732140 is an abundant number, since it is smaller than the sum of its proper divisors (36612340).

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

30732140 is a wasteful number, since it uses less digits than its factorization.

30732140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66841 (or 66839 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 30732140 is about 5543.6576373366. The cubic root of 30732140 is about 313.2306614966.

Adding to 30732140 its reverse (4123703), we get a palindrome (34855843).

The spelling of 30732140 in words is "thirty million, seven hundred thirty-two thousand, one hundred forty".