340209747 has 8 divisors (see below), whose sum is σ = 504014480. Its totient is φ = 226806480.

The previous prime is 340209743. The next prime is 340209757. The reversal of 340209747 is 747902043.

It is not a de Polignac number, because 340209747 - 2² = 340209743 is a prime.

It is a super-4 number, since 4×340209747⁴ (a number of 35 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340209743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6300154 + ... + 6300207.

It is an arithmetic number, because the mean of its divisors is an integer number (63001810).

Almost surely, 2^340209747 is an apocalyptic number.

340209747 is a deficient number, since it is larger than the sum of its proper divisors (163804733).

340209747 is a wasteful number, since it uses less digits than its factorization.

340209747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12600370 (or 12600364 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 340209747 is about 18444.7756017795. The cubic root of 340209747 is about 698.0966983160.

The spelling of 340209747 in words is "three hundred forty million, two hundred nine thousand, seven hundred forty-seven".