340621056 has 216 divisors, whose sum is σ = 1071383040. Its totient is φ = 103680000.

The previous prime is 340621033. The next prime is 340621093. The reversal of 340621056 is 650126043.

340621056 is a `hidden beast` number, since 34 + 0 + 621 + 0 + 5 + 6 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1356931 + ... + 1357181.

Almost surely, 2^340621056 is an apocalyptic number.

340621056 is a gapful number since it is divisible by the number (36) 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 340621056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (535691520).

340621056 is an abundant number, since it is smaller than the sum of its proper divisors (730761984).

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

340621056 is a wasteful number, since it uses less digits than its factorization.

340621056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323 (or 306 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 340621056 is about 18455.9219764281. The cubic root of 340621056 is about 698.3779148513.

Adding to 340621056 its reverse (650126043), we get a palindrome (990747099).

The spelling of 340621056 in words is "three hundred forty million, six hundred twenty-one thousand, fifty-six".