30689145 has 32 divisors (see below), whose sum is σ = 55497600. Its totient is φ = 16085952.

The previous prime is 30689119. The next prime is 30689147. The reversal of 30689145 is 54198603.

It is not a de Polignac number, because 30689145 - 2⁶ = 30689081 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30689147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6039 + ... + 9891.

It is an arithmetic number, because the mean of its divisors is an integer number (1734300).

Almost surely, 2^30689145 is an apocalyptic number.

It is an amenable number.

30689145 is a deficient number, since it is larger than the sum of its proper divisors (24808455).

30689145 is a wasteful number, since it uses less digits than its factorization.

30689145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3926 (or 3920 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 30689145 is about 5539.7784251719. The cubic root of 30689145 is about 313.0845209246.

It can be divided in two parts, 306891 and 45, that added together give a triangular number (306936 = T₇₈₃).

The spelling of 30689145 in words is "thirty million, six hundred eighty-nine thousand, one hundred forty-five".