126890550 has 240 divisors, whose sum is σ = 397005840. Its totient is φ = 29859840.

The previous prime is 126890539. The next prime is 126890557. The reversal of 126890550 is 55098621.

It is a happy number.

126890550 is a `hidden beast` number, since 1 + 26 + 89 + 0 + 550 = 666.

It is a super-2 number, since 2×126890550² = 32202423358605000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126890557) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 1308102 + ... + 1308198.

It is an arithmetic number, because the mean of its divisors is an integer number (1654191).

Almost surely, 2^126890550 is an apocalyptic number.

126890550 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 126890550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198502920).

126890550 is an abundant number, since it is smaller than the sum of its proper divisors (270115290).

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

126890550 is a wasteful number, since it uses less digits than its factorization.

126890550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 126890550 is about 11264.5705643846. The cubic root of 126890550 is about 502.5081308553.

The spelling of 126890550 in words is "one hundred twenty-six million, eight hundred ninety thousand, five hundred fifty".