126784890 has 48 divisors (see below), whose sum is σ = 331344000. Its totient is φ = 33634656.

The previous prime is 126784871. The next prime is 126784919. The reversal of 126784890 is 98487621.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14371 + ... + 21449.

It is an arithmetic number, because the mean of its divisors is an integer number (6903000).

Almost surely, 2^126784890 is an apocalyptic number.

126784890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 126784890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165672000).

126784890 is an abundant number, since it is smaller than the sum of its proper divisors (204559110).

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

126784890 is a wasteful number, since it uses less digits than its factorization.

126784890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7291 (or 7288 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 126784890 is about 11259.8796618792. The cubic root of 126784890 is about 502.3686149415.

The spelling of 126784890 in words is "one hundred twenty-six million, seven hundred eighty-four thousand, eight hundred ninety".