30729740 has 12 divisors (see below), whose sum is σ = 64532496. Its totient is φ = 12291888.

The previous prime is 30729733. The next prime is 30729757. The reversal of 30729740 is 4792703.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 30729697 and 30729706.

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, 768224 + ... + 768263.

It is an arithmetic number, because the mean of its divisors is an integer number (5377708).

Almost surely, 2^30729740 is an apocalyptic number.

It is an amenable number.

30729740 is an abundant number, since it is smaller than the sum of its proper divisors (33802756).

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

30729740 is a wasteful number, since it uses less digits than its factorization.

30729740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1536496 (or 1536494 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 30729740 is about 5543.4411695264. The cubic root of 30729740 is about 313.2225074581. Note that the first 3 decimals are identical.

The spelling of 30729740 in words is "thirty million, seven hundred twenty-nine thousand, seven hundred forty".