655584340 has 12 divisors (see below), whose sum is σ = 1376727156. Its totient is φ = 262233728.

The previous prime is 655584337. The next prime is 655584343. The reversal of 655584340 is 43485556.

It is an interprime number because it is at equal distance from previous prime (655584337) and next prime (655584343).

It can be written as a sum of positive squares in 2 ways, for example, as 400160016 + 255424324 = 20004^2 + 15982^2 .

It is a junction number, because it is equal to n+sod(n) for n = 655584293 and 655584302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655584343) 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, 16389589 + ... + 16389628.

It is an arithmetic number, because the mean of its divisors is an integer number (114727263).

Almost surely, 2^655584340 is an apocalyptic number.

It is an amenable number.

655584340 is an abundant number, since it is smaller than the sum of its proper divisors (721142816).

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

655584340 is a wasteful number, since it uses less digits than its factorization.

655584340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32779226 (or 32779224 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 40.

The square root of 655584340 is about 25604.3812657131. The cubic root of 655584340 is about 868.7127393574.

The spelling of 655584340 in words is "six hundred fifty-five million, five hundred eighty-four thousand, three hundred forty".