30729470 has 8 divisors (see below), whose sum is σ = 55313064. Its totient is φ = 12291784.

The previous prime is 30729469. The next prime is 30729481. The reversal of 30729470 is 7492703.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between odd and even.

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, 1536464 + ... + 1536483.

It is an arithmetic number, because the mean of its divisors is an integer number (6914133).

Almost surely, 2^30729470 is an apocalyptic number.

30729470 is a deficient number, since it is larger than the sum of its proper divisors (24583594).

30729470 is a wasteful number, since it uses less digits than its factorization.

30729470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3072954.

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

The square root of 30729470 is about 5543.4168163688. The cubic root of 30729470 is about 313.2215901022.

The spelling of 30729470 in words is "thirty million, seven hundred twenty-nine thousand, four hundred seventy".