266929920 has 432 divisors, whose sum is σ = 1033119360. Its totient is φ = 63307776.

The previous prime is 266929919. The next prime is 266929921. The reversal of 266929920 is 29929662.

It is an interprime number because it is at equal distance from previous prime (266929919) and next prime (266929921).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266929921) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5679337 + ... + 5679383.

It is an arithmetic number, because the mean of its divisors is an integer number (2391480).

Almost surely, 2^266929920 is an apocalyptic number.

266929920 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 266929920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (516559680).

266929920 is an abundant number, since it is smaller than the sum of its proper divisors (766189440).

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

266929920 is a wasteful number, since it uses less digits than its factorization.

266929920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 266929920 is about 16337.9900844627. The cubic root of 266929920 is about 643.8713269924.

The spelling of 266929920 in words is "two hundred sixty-six million, nine hundred twenty-nine thousand, nine hundred twenty".