266215400 has 48 divisors (see below), whose sum is σ = 675224640. Its totient is φ = 96804800.

The previous prime is 266215399. The next prime is 266215429. The reversal of 266215400 is 4512662.

It is a self number, because there is not a number n which added to its sum of digits gives 266215400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58304 + ... + 62703.

It is an arithmetic number, because the mean of its divisors is an integer number (14067180).

Almost surely, 2^266215400 is an apocalyptic number.

266215400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266215400 is an abundant number, since it is smaller than the sum of its proper divisors (409009240).

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

266215400 is a wasteful number, since it uses less digits than its factorization.

266215400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121034 (or 121025 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 266215400 is about 16316.1086046888. The cubic root of 266215400 is about 643.2963070914.

The spelling of 266215400 in words is "two hundred sixty-six million, two hundred fifteen thousand, four hundred".