30155628 has 24 divisors (see below), whose sum is σ = 71415232. Its totient is φ = 9901584.

The previous prime is 30155627. The next prime is 30155639. The reversal of 30155628 is 82655103.

It is a junction number, because it is equal to n+sod(n) for n = 30155595 and 30155604.

It is not an unprimeable number, because it can be changed into a prime (30155627) 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, 17950 + ... + 19557.

Almost surely, 2^30155628 is an apocalyptic number.

It is an amenable number.

30155628 is an abundant number, since it is smaller than the sum of its proper divisors (41259604).

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

30155628 is a wasteful number, since it uses less digits than its factorization.

30155628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37581 (or 37579 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 30155628 is about 5491.4140255493. The cubic root of 30155628 is about 311.2596268050.

The spelling of 30155628 in words is "thirty million, one hundred fifty-five thousand, six hundred twenty-eight".