126690390 has 24 divisors (see below), whose sum is σ = 329395248. Its totient is φ = 33784080.

The previous prime is 126690349. The next prime is 126690391. The reversal of 126690390 is 93096621.

126690390 is a `hidden beast` number, since 1 + 266 + 9 + 0 + 390 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126690391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 703746 + ... + 703925.

It is an arithmetic number, because the mean of its divisors is an integer number (13724802).

Almost surely, 2^126690390 is an apocalyptic number.

126690390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

126690390 is an abundant number, since it is smaller than the sum of its proper divisors (202704858).

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

126690390 is a wasteful number, since it uses less digits than its factorization.

126690390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1407684 (or 1407681 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 126690390 is about 11255.6825648203. The cubic root of 126690390 is about 502.2437692706.

The spelling of 126690390 in words is "one hundred twenty-six million, six hundred ninety thousand, three hundred ninety".