340408747 has 4 divisors (see below), whose sum is σ = 389038576. Its totient is φ = 291778920.

The previous prime is 340408721. The next prime is 340408751. The reversal of 340408747 is 747804043.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 340408747 - 2⁷ = 340408619 is a prime.

It is a super-2 number, since 2×340408747² = 231756230068220018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340408777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24314904 + ... + 24314917.

It is an arithmetic number, because the mean of its divisors is an integer number (97259644).

Almost surely, 2^340408747 is an apocalyptic number.

340408747 is a deficient number, since it is larger than the sum of its proper divisors (48629829).

340408747 is an equidigital number, since it uses as much as digits as its factorization.

340408747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48629828.

The product of its (nonzero) digits is 75264, while the sum is 37.

The square root of 340408747 is about 18450.1692946162. The cubic root of 340408747 is about 698.2327851138.

The spelling of 340408747 in words is "three hundred forty million, four hundred eight thousand, seven hundred forty-seven".