30144729 has 4 divisors (see below), whose sum is σ = 40192976. Its totient is φ = 20096484.

The previous prime is 30144727. The next prime is 30144749. The reversal of 30144729 is 92744103.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92744103 = 3 ⋅30914701.

It is not a de Polignac number, because 30144729 - 2¹ = 30144727 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30144696 and 30144705.

It is not an unprimeable number, because it can be changed into a prime (30144721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5024119 + ... + 5024124.

It is an arithmetic number, because the mean of its divisors is an integer number (10048244).

Almost surely, 2^30144729 is an apocalyptic number.

It is an amenable number.

30144729 is a deficient number, since it is larger than the sum of its proper divisors (10048247).

30144729 is a wasteful number, since it uses less digits than its factorization.

30144729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10048246.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 30144729 is about 5490.4215685137. The cubic root of 30144729 is about 311.2221232755. Note that the first 3 decimals are identical.

It can be divided in two parts, 301447 and 29, that added together give a triangular number (301476 = T₇₇₆).

The spelling of 30144729 in words is "thirty million, one hundred forty-four thousand, seven hundred twenty-nine".