30149739 has 24 divisors (see below), whose sum is σ = 46034352. Its totient is φ = 19712160.

The previous prime is 30149731. The next prime is 30149741. The reversal of 30149739 is 93794103.

It is not a de Polignac number, because 30149739 - 2³ = 30149731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30149731) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11709 + ... + 14049.

It is an arithmetic number, because the mean of its divisors is an integer number (1918098).

Almost surely, 2^30149739 is an apocalyptic number.

30149739 is a deficient number, since it is larger than the sum of its proper divisors (15884613).

30149739 is an equidigital number, since it uses as much as digits as its factorization.

30149739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2409 (or 2397 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 30149739 is about 5490.8777986766. The cubic root of 30149739 is about 311.2393638403.

It can be divided in two parts, 30 and 149739, that added together give a square (149769 = 387²).

The spelling of 30149739 in words is "thirty million, one hundred forty-nine thousand, seven hundred thirty-nine".