30138602 has 32 divisors (see below), whose sum is σ = 51408000. Its totient is φ = 13147200.

The previous prime is 30138601. The next prime is 30138611. The reversal of 30138602 is 20683103.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (30138601) 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, 60149 + ... + 60647.

It is an arithmetic number, because the mean of its divisors is an integer number (1606500).

Almost surely, 2^30138602 is an apocalyptic number.

30138602 is a deficient number, since it is larger than the sum of its proper divisors (21269398).

30138602 is a wasteful number, since it uses less digits than its factorization.

30138602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 30138602 is about 5489.8635684323. The cubic root of 30138602 is about 311.2010362594.

The spelling of 30138602 in words is "thirty million, one hundred thirty-eight thousand, six hundred two".