30742428 has 24 divisors (see below), whose sum is σ = 71906688. Its totient is φ = 10222576.

The previous prime is 30742427. The next prime is 30742433. The reversal of 30742428 is 82424703.

It is a junction number, because it is equal to n+sod(n) for n = 30742395 and 30742404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30742423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2425 + ... + 8207.

It is an arithmetic number, because the mean of its divisors is an integer number (2996112).

Almost surely, 2^30742428 is an apocalyptic number.

It is an amenable number.

30742428 is an abundant number, since it is smaller than the sum of its proper divisors (41164260).

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

30742428 is a wasteful number, since it uses less digits than its factorization.

30742428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6233 (or 6231 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 30742428 is about 5544.5854669218. The cubic root of 30742428 is about 313.2656103322.

The spelling of 30742428 in words is "thirty million, seven hundred forty-two thousand, four hundred twenty-eight".