30747438 has 20 divisors (see below), whose sum is σ = 68897400. Its totient is φ = 10249092.

The previous prime is 30747419. The next prime is 30747449. The reversal of 30747438 is 83474703.

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 9 ways as a sum of consecutive naturals, for example, 94738 + ... + 95061.

It is an arithmetic number, because the mean of its divisors is an integer number (3444870).

Almost surely, 2^30747438 is an apocalyptic number.

30747438 is an abundant number, since it is smaller than the sum of its proper divisors (38149962).

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

30747438 is a wasteful number, since it uses less digits than its factorization.

30747438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189813 (or 189804 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The square root of 30747438 is about 5545.0372406324. The cubic root of 30747438 is about 313.2826267224.

The spelling of 30747438 in words is "thirty million, seven hundred forty-seven thousand, four hundred thirty-eight".