30778126 has 16 divisors (see below), whose sum is σ = 50077440. Its totient is φ = 14129920.

The previous prime is 30778103. The next prime is 30778127. The reversal of 30778126 is 62187703.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 30778091 and 30778100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30778127) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9646 + ... + 12433.

It is an arithmetic number, because the mean of its divisors is an integer number (3129840).

Almost surely, 2^30778126 is an apocalyptic number.

30778126 is a deficient number, since it is larger than the sum of its proper divisors (19299314).

30778126 is a wasteful number, since it uses less digits than its factorization.

30778126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22139.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 30778126 is about 5547.8037095773. The cubic root of 30778126 is about 313.3868177398.

The spelling of 30778126 in words is "thirty million, seven hundred seventy-eight thousand, one hundred twenty-six".