30153640 has 32 divisors (see below), whose sum is σ = 74014560. Its totient is φ = 10964800.

The previous prime is 30153637. The next prime is 30153647. The reversal of 30153640 is 4635103.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (30153647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33826 + ... + 34705.

It is an arithmetic number, because the mean of its divisors is an integer number (2312955).

Almost surely, 2^30153640 is an apocalyptic number.

It is an amenable number.

30153640 is an abundant number, since it is smaller than the sum of its proper divisors (43860920).

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

30153640 is a wasteful number, since it uses less digits than its factorization.

30153640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68553 (or 68549 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 30153640 is about 5491.2330127213. The cubic root of 30153640 is about 311.2527867581.

Adding to 30153640 its reverse (4635103), we get a palindrome (34788743).

The spelling of 30153640 in words is "thirty million, one hundred fifty-three thousand, six hundred forty".