126356778 has 24 divisors (see below), whose sum is σ = 275362308. Its totient is φ = 41874432.

The previous prime is 126356777. The next prime is 126356827. The reversal of 126356778 is 877653621.

126356778 is a `hidden beast` number, since 1 + 2 + 635 + 6 + 7 + 7 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 114639849 + 11716929 = 10707^2 + 3423^2 .

It is not an unprimeable number, because it can be changed into a prime (126356773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17175 + ... + 23402.

Almost surely, 2^126356778 is an apocalyptic number.

126356778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

126356778 is an abundant number, since it is smaller than the sum of its proper divisors (149005530).

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

126356778 is a wasteful number, since it uses less digits than its factorization.

126356778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40758 (or 40755 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 126356778 is about 11240.8530815059. The cubic root of 126356778 is about 501.8025312864.

The spelling of 126356778 in words is "one hundred twenty-six million, three hundred fifty-six thousand, seven hundred seventy-eight".