126388990 has 32 divisors (see below), whose sum is σ = 280002240. Its totient is φ = 39999744.

The previous prime is 126388987. The next prime is 126389009. The reversal of 126388990 is 99883621.

It is a self number, because there is not a number n which added to its sum of digits gives 126388990.

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, 68535 + ... + 70354.

It is an arithmetic number, because the mean of its divisors is an integer number (8750070).

Almost surely, 2^126388990 is an apocalyptic number.

126388990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

126388990 is an abundant number, since it is smaller than the sum of its proper divisors (153613250).

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

126388990 is a wasteful number, since it uses less digits than its factorization.

126388990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138916.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 126388990 is about 11242.2857996050. The cubic root of 126388990 is about 501.8451689932.

The spelling of 126388990 in words is "one hundred twenty-six million, three hundred eighty-eight thousand, nine hundred ninety".