30732428 has 6 divisors (see below), whose sum is σ = 53781756. Its totient is φ = 15366212.

The previous prime is 30732409. The next prime is 30732437. The reversal of 30732428 is 82423703.

It is a self number, because there is not a number n which added to its sum of digits gives 30732428.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3841550 + ... + 3841557.

It is an arithmetic number, because the mean of its divisors is an integer number (8963626).

Almost surely, 2^30732428 is an apocalyptic number.

It is an amenable number.

30732428 is a deficient number, since it is larger than the sum of its proper divisors (23049328).

30732428 is a wasteful number, since it uses less digits than its factorization.

30732428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7683111 (or 7683109 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 30732428 is about 5543.6836129058. The cubic root of 30732428 is about 313.2316399527.

The spelling of 30732428 in words is "thirty million, seven hundred thirty-two thousand, four hundred twenty-eight".