126857990 has 32 divisors (see below), whose sum is σ = 261368640. Its totient is φ = 43426944.

The previous prime is 126857989. The next prime is 126857999. The reversal of 126857990 is 99758621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126857999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70016 + ... + 71804.

It is an arithmetic number, because the mean of its divisors is an integer number (8167770).

Almost surely, 2^126857990 is an apocalyptic number.

126857990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

126857990 is an abundant number, since it is smaller than the sum of its proper divisors (134510650).

126857990 is a wasteful number, since it uses less digits than its factorization.

126857990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2816.

The product of its (nonzero) digits is 272160, while the sum is 47.

The square root of 126857990 is about 11263.1252323678. The cubic root of 126857990 is about 502.4651461350.

The spelling of 126857990 in words is "one hundred twenty-six million, eight hundred fifty-seven thousand, nine hundred ninety".