30155540 has 24 divisors (see below), whose sum is σ = 63451080. Its totient is φ = 12038528.

The previous prime is 30155539. The next prime is 30155557. The reversal of 30155540 is 4555103.

It can be written as a sum of positive squares in 4 ways, for example, as 3818116 + 26337424 = 1954^2 + 5132^2 .

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, 11906 + ... + 14214.

It is an arithmetic number, because the mean of its divisors is an integer number (2643795).

Almost surely, 2^30155540 is an apocalyptic number.

It is an amenable number.

30155540 is an abundant number, since it is smaller than the sum of its proper divisors (33295540).

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

30155540 is a wasteful number, since it uses less digits than its factorization.

30155540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2971 (or 2969 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 30155540 is about 5491.4060130353. The cubic root of 30155540 is about 311.2593240327.

The spelling of 30155540 in words is "thirty million, one hundred fifty-five thousand, five hundred forty".