30145872 has 40 divisors (see below), whose sum is σ = 78374944. Its totient is φ = 9984384.

The previous prime is 30145831. The next prime is 30145883. The reversal of 30145872 is 27854103.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5898 + ... + 9750.

Almost surely, 2^30145872 is an apocalyptic number.

It is an amenable number.

30145872 is an abundant number, since it is smaller than the sum of its proper divisors (48229072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30145872 is a wasteful number, since it uses less digits than its factorization.

30145872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4027 (or 4021 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 30145872 is about 5490.5256578947. The cubic root of 30145872 is about 311.2260567701.

Adding to 30145872 its reverse (27854103), we get a palindrome (57999975).

The spelling of 30145872 in words is "thirty million, one hundred forty-five thousand, eight hundred seventy-two".