30155390 has 8 divisors (see below), whose sum is σ = 54279720. Its totient is φ = 12062152.

The previous prime is 30155387. The next prime is 30155401. The reversal of 30155390 is 9355103.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1507760 + ... + 1507779.

It is an arithmetic number, because the mean of its divisors is an integer number (6784965).

Almost surely, 2^30155390 is an apocalyptic number.

30155390 is a deficient number, since it is larger than the sum of its proper divisors (24124330).

30155390 is a wasteful number, since it uses less digits than its factorization.

30155390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3015546.

The product of its (nonzero) digits is 2025, while the sum is 26.

The square root of 30155390 is about 5491.3923553139. The cubic root of 30155390 is about 311.2588079420.

The spelling of 30155390 in words is "thirty million, one hundred fifty-five thousand, three hundred ninety".