30378623 has 6 divisors (see below), whose sum is σ = 33391512. Its totient is φ = 27616820.

The previous prime is 30378619. The next prime is 30378641. The reversal of 30378623 is 32687303.

It is not a de Polignac number, because 30378623 - 2² = 30378619 is a prime.

It is a super-2 number, since 2×30378623² = 1845721470752258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30378623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30378613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 125411 + ... + 125652.

It is an arithmetic number, because the mean of its divisors is an integer number (5565252).

Almost surely, 2^30378623 is an apocalyptic number.

30378623 is a deficient number, since it is larger than the sum of its proper divisors (3012889).

30378623 is a wasteful number, since it uses less digits than its factorization.

30378623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251085 (or 251074 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 30378623 is about 5511.6805966964. The cubic root of 30378623 is about 312.0249781394.

The spelling of 30378623 in words is "thirty million, three hundred seventy-eight thousand, six hundred twenty-three".