266245140 has 96 divisors (see below), whose sum is σ = 854219520. Its totient is φ = 60696576.

The previous prime is 266245123. The next prime is 266245141. The reversal of 266245140 is 41542662.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 266245098 and 266245107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266245141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 248526 + ... + 249594.

It is an arithmetic number, because the mean of its divisors is an integer number (8898120).

Almost surely, 2^266245140 is an apocalyptic number.

266245140 is a gapful number since it is divisible by the number (20) 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 266245140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (427109760).

266245140 is an abundant number, since it is smaller than the sum of its proper divisors (587974380).

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

266245140 is a wasteful number, since it uses less digits than its factorization.

266245140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1681 (or 1679 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 266245140 is about 16317.0199485078. The cubic root of 266245140 is about 643.3202612776.

The spelling of 266245140 in words is "two hundred sixty-six million, two hundred forty-five thousand, one hundred forty".