340148781 has 32 divisors (see below), whose sum is σ = 576998400. Its totient is φ = 194004720.

The previous prime is 340148759. The next prime is 340148789. The reversal of 340148781 is 187841043.

It is not a de Polignac number, because 340148781 - 2¹¹ = 340146733 is a prime.

It is a super-2 number, since 2×340148781² = 231402386431571922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340148789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123186 + ... + 125916.

It is an arithmetic number, because the mean of its divisors is an integer number (18031200).

Almost surely, 2^340148781 is an apocalyptic number.

It is an amenable number.

340148781 is a deficient number, since it is larger than the sum of its proper divisors (236849619).

340148781 is a wasteful number, since it uses less digits than its factorization.

340148781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3406 (or 3400 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 340148781 is about 18443.1228646344. The cubic root of 340148781 is about 698.0549958993.

The spelling of 340148781 in words is "three hundred forty million, one hundred forty-eight thousand, seven hundred eighty-one".