30729642 has 32 divisors (see below), whose sum is σ = 65981952. Its totient is φ = 9506304.

The previous prime is 30729641. The next prime is 30729667. The reversal of 30729642 is 24692703.

It is not an unprimeable number, because it can be changed into a prime (30729641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5383 + ... + 9509.

It is an arithmetic number, because the mean of its divisors is an integer number (2061936).

Almost surely, 2^30729642 is an apocalyptic number.

30729642 is an abundant number, since it is smaller than the sum of its proper divisors (35252310).

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

30729642 is a wasteful number, since it uses less digits than its factorization.

30729642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4222.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 30729642 is about 5543.4323302445. The cubic root of 30729642 is about 313.2221744925. Note that the first 3 decimals are identical.

The spelling of 30729642 in words is "thirty million, seven hundred twenty-nine thousand, six hundred forty-two".