126400536 has 24 divisors (see below), whose sum is σ = 342334980. Its totient is φ = 42133488.

The previous prime is 126400523. The next prime is 126400541. The reversal of 126400536 is 635004621.

126400536 is a `hidden beast` number, since 12 + 640 + 0 + 5 + 3 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

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 5 ways as a sum of consecutive naturals, for example, 877710 + ... + 877853.

Almost surely, 2^126400536 is an apocalyptic number.

It is an amenable number.

126400536 is an abundant number, since it is smaller than the sum of its proper divisors (215934444).

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

126400536 is a wasteful number, since it uses less digits than its factorization.

126400536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755575 (or 1755568 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 126400536 is about 11242.7992955491. The cubic root of 126400536 is about 501.8604501974.

The spelling of 126400536 in words is "one hundred twenty-six million, four hundred thousand, five hundred thirty-six".