339944781 has 12 divisors (see below), whose sum is σ = 498211616. Its totient is φ = 206026920.

The previous prime is 339944779. The next prime is 339944797. The reversal of 339944781 is 187449933.

It is a happy number.

It is not a de Polignac number, because 339944781 - 2¹ = 339944779 is a prime.

It is a super-2 number, since 2×339944781² = 231124908258275922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 339944781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (339944741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 467881 + ... + 468606.

Almost surely, 2^339944781 is an apocalyptic number.

It is an amenable number.

339944781 is a deficient number, since it is larger than the sum of its proper divisors (158266835).

339944781 is a wasteful number, since it uses less digits than its factorization.

339944781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936512 (or 936501 counting only the distinct ones).

The product of its digits is 653184, while the sum is 48.

The square root of 339944781 is about 18437.5915184169. The cubic root of 339944781 is about 697.9154180589.

It can be divided in two parts, 3399447 and 81, that added together give a triangular number (3399528 = T₂₆₀₇).

The spelling of 339944781 in words is "three hundred thirty-nine million, nine hundred forty-four thousand, seven hundred eighty-one".