268412781 has 16 divisors (see below), whose sum is σ = 440472704. Its totient is φ = 141580224.

The previous prime is 268412741. The next prime is 268412789. The reversal of 268412781 is 187214862.

It is a happy number.

It is not a de Polignac number, because 268412781 - 2⁶ = 268412717 is a prime.

It is a super-2 number, since 2×268412781² = 144090842008307922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268412789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 491326 + ... + 491871.

It is an arithmetic number, because the mean of its divisors is an integer number (27529544).

Almost surely, 2^268412781 is an apocalyptic number.

268412781 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

268412781 is a deficient number, since it is larger than the sum of its proper divisors (172059923).

268412781 is a wasteful number, since it uses less digits than its factorization.

268412781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983220.

The product of its digits is 43008, while the sum is 39.

The square root of 268412781 is about 16383.3079993022. The cubic root of 268412781 is about 645.0614135382.

The spelling of 268412781 in words is "two hundred sixty-eight million, four hundred twelve thousand, seven hundred eighty-one".