266197400 has 144 divisors (see below), whose sum is σ = 751893840. Its totient is φ = 87225600.

The previous prime is 266197381. The next prime is 266197411. The reversal of 266197400 is 4791662.

It is a super-2 number, since 2×266197400² = 141722111533520000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a nialpdrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 224810 + ... + 225990.

It is an arithmetic number, because the mean of its divisors is an integer number (5221485).

Almost surely, 2^266197400 is an apocalyptic number.

266197400 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 266197400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (375946920).

266197400 is an abundant number, since it is smaller than the sum of its proper divisors (485696440).

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

266197400 is a wasteful number, since it uses less digits than its factorization.

266197400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234 (or 1218 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 266197400 is about 16315.5569932503. The cubic root of 266197400 is about 643.2818080622.

The spelling of 266197400 in words is "two hundred sixty-six million, one hundred ninety-seven thousand, four hundred".