126287640 has 64 divisors (see below), whose sum is σ = 420962400. Its totient is φ = 33676416.

The previous prime is 126287627. The next prime is 126287653. The reversal of 126287640 is 46782621.

126287640 is a `hidden beast` number, since 1 + 2 + 6 + 2 + 8 + 7 + 640 = 666.

It is an interprime number because it is at equal distance from previous prime (126287627) and next prime (126287653).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 126287595 and 126287604.

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, 57387 + ... + 59546.

Almost surely, 2^126287640 is an apocalyptic number.

126287640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126287640 is an abundant number, since it is smaller than the sum of its proper divisors (294674760).

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

126287640 is a wasteful number, since it uses less digits than its factorization.

126287640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116953 (or 116943 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 126287640 is about 11237.7773603146. Note that the first 3 decimals coincide. The cubic root of 126287640 is about 501.7109916698.

The spelling of 126287640 in words is "one hundred twenty-six million, two hundred eighty-seven thousand, six hundred forty".