30729944 has 16 divisors (see below), whose sum is σ = 65850000. Its totient is φ = 13169952.

The previous prime is 30729899. The next prime is 30729953. The reversal of 30729944 is 44992703.

It is a junction number, because it is equal to n+sod(n) for n = 30729898 and 30729907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274319 + ... + 274430.

It is an arithmetic number, because the mean of its divisors is an integer number (4115625).

Almost surely, 2^30729944 is an apocalyptic number.

It is an amenable number.

30729944 is an abundant number, since it is smaller than the sum of its proper divisors (35120056).

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

30729944 is a wasteful number, since it uses less digits than its factorization.

30729944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548762 (or 548758 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 30729944 is about 5543.4595696190. The cubic root of 30729944 is about 313.2232005679.

The spelling of 30729944 in words is "thirty million, seven hundred twenty-nine thousand, nine hundred forty-four".