126867280 has 40 divisors (see below), whose sum is σ = 297693000. Its totient is φ = 50277888.

The previous prime is 126867271. The next prime is 126867281. The reversal of 126867280 is 82768621.

It can be written as a sum of positive squares in 4 ways, for example, as 41267776 + 85599504 = 6424^2 + 9252^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126867281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1446 + ... + 15994.

It is an arithmetic number, because the mean of its divisors is an integer number (7442325).

Almost surely, 2^126867280 is an apocalyptic number.

126867280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 126867280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148846500).

126867280 is an abundant number, since it is smaller than the sum of its proper divisors (170825720).

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

126867280 is a wasteful number, since it uses less digits than its factorization.

126867280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14671 (or 14665 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 126867280 is about 11263.5376325558. The cubic root of 126867280 is about 502.4774112599.

The spelling of 126867280 in words is "one hundred twenty-six million, eight hundred sixty-seven thousand, two hundred eighty".