8101778428 has 48 divisors (see below), whose sum is σ = 15027586560. Its totient is φ = 3814184000.

The previous prime is 8101778413. The next prime is 8101778431. The reversal of 8101778428 is 8248771018.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1660833 + ... + 1665703.

It is an arithmetic number, because the mean of its divisors is an integer number (313074720).

Almost surely, 2^8101778428 is an apocalyptic number.

It is an amenable number.

8101778428 is a deficient number, since it is larger than the sum of its proper divisors (6925808132).

8101778428 is a wasteful number, since it uses less digits than its factorization.

8101778428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5178 (or 5176 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 46.

The square root of 8101778428 is about 90009.8796132958. The cubic root of 8101778428 is about 2008.4458195282.

The spelling of 8101778428 in words is "eight billion, one hundred one million, seven hundred seventy-eight thousand, four hundred twenty-eight".