30705038 has 32 divisors (see below), whose sum is σ = 57226176. Its totient is φ = 12031488.

The previous prime is 30705019. The next prime is 30705049. The reversal of 30705038 is 83050703.

It is a Harshad number since it is a multiple of its sum of digits (26).

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

It is a junction number, because it is equal to n+sod(n) for n = 30704998 and 30705016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19820 + ... + 21312.

It is an arithmetic number, because the mean of its divisors is an integer number (1788318).

Almost surely, 2^30705038 is an apocalyptic number.

30705038 is a deficient number, since it is larger than the sum of its proper divisors (26521138).

30705038 is a wasteful number, since it uses less digits than its factorization.

30705038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1628.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 30705038 is about 5541.2126831588. The cubic root of 30705038 is about 313.1385573338.

The spelling of 30705038 in words is "thirty million, seven hundred five thousand, thirty-eight".