340736640 has 64 divisors (see below), whose sum is σ = 1086104160. Its totient is φ = 90862592.

The previous prime is 340736621. The next prime is 340736647. The reversal of 340736640 is 46637043.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×340736640² = 232202915676979200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (340736647) 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, 86814 + ... + 90653.

Almost surely, 2^340736640 is an apocalyptic number.

340736640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

340736640 is an abundant number, since it is smaller than the sum of its proper divisors (745367520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

340736640 is a wasteful number, since it uses less digits than its factorization.

340736640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177489 (or 177477 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 33.

The square root of 340736640 is about 18459.0530634700. The cubic root of 340736640 is about 698.4569001663.

The spelling of 340736640 in words is "three hundred forty million, seven hundred thirty-six thousand, six hundred forty".