126388820 has 12 divisors (see below), whose sum is σ = 265416564. Its totient is φ = 50555520.

The previous prime is 126388813. The next prime is 126388837. The reversal of 126388820 is 28883621.

It can be written as a sum of positive squares in 2 ways, for example, as 66357316 + 60031504 = 8146^2 + 7748^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3159701 + ... + 3159740.

It is an arithmetic number, because the mean of its divisors is an integer number (22118047).

Almost surely, 2^126388820 is an apocalyptic number.

126388820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126388820 is an abundant number, since it is smaller than the sum of its proper divisors (139027744).

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

126388820 is a wasteful number, since it uses less digits than its factorization.

126388820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6319450 (or 6319448 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 126388820 is about 11242.2782388624. The cubic root of 126388820 is about 501.8449439902.

The spelling of 126388820 in words is "one hundred twenty-six million, three hundred eighty-eight thousand, eight hundred twenty".