30878028444 has 12 divisors (see below), whose sum is σ = 72048733064. Its totient is φ = 10292676144.

The previous prime is 30878028431. The next prime is 30878028449. The reversal of 30878028444 is 44482087803.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×30878028444² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 30878028393 and 30878028402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30878028449) 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 3 ways as a sum of consecutive naturals, for example, 1286584507 + ... + 1286584530.

Almost surely, 2^30878028444 is an apocalyptic number.

It is an amenable number.

30878028444 is an abundant number, since it is smaller than the sum of its proper divisors (41170704620).

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

30878028444 is a wasteful number, since it uses less digits than its factorization.

30878028444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2573169044 (or 2573169042 counting only the distinct ones).

The product of its (nonzero) digits is 1376256, while the sum is 48.

The spelling of 30878028444 in words is "thirty billion, eight hundred seventy-eight million, twenty-eight thousand, four hundred forty-four".