340520640 has 112 divisors (see below), whose sum is σ = 1104302592. Its totient is φ = 88861696.

The previous prime is 340520623. The next prime is 340520651. The reversal of 340520640 is 46025043.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 340520640.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41347 + ... + 48893.

Almost surely, 2^340520640 is an apocalyptic number.

340520640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 340520640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (552151296).

340520640 is an abundant number, since it is smaller than the sum of its proper divisors (763781952).

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

340520640 is a wasteful number, since it uses less digits than its factorization.

340520640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7614 (or 7604 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 340520640 is about 18453.2013482756. The cubic root of 340520640 is about 698.3092802128.

Adding to 340520640 its reverse (46025043), we get a palindrome (386545683).

The spelling of 340520640 in words is "three hundred forty million, five hundred twenty thousand, six hundred forty".