30478138623 has 8 divisors (see below), whose sum is σ = 45152798000. Its totient is φ = 20318759064.

The previous prime is 30478138601. The next prime is 30478138631. The reversal of 30478138623 is 32683187403.

30478138623 is a `hidden beast` number, since 3 + 0 + 4 + 7 + 8 + 13 + 8 + 623 = 666.

It is not a de Polignac number, because 30478138623 - 2⁸ = 30478138367 is a prime.

It is a super-2 number, since 2×30478138623² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30478138673) 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, 564409948 + ... + 564410001.

It is an arithmetic number, because the mean of its divisors is an integer number (5644099750).

Almost surely, 2^30478138623 is an apocalyptic number.

30478138623 is a deficient number, since it is larger than the sum of its proper divisors (14674659377).

30478138623 is a wasteful number, since it uses less digits than its factorization.

30478138623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128819958 (or 1128819952 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 30478138623 in words is "thirty billion, four hundred seventy-eight million, one hundred thirty-eight thousand, six hundred twenty-three".