655940736 has 192 divisors, whose sum is σ = 2116296000. Its totient is φ = 193259520.

The previous prime is 655940731. The next prime is 655940759. The reversal of 655940736 is 637049556.

It is a tau number, because it is divible by the number of its divisors (192).

It is a junction number, because it is equal to n+sod(n) for n = 655940691 and 655940700.

It is not an unprimeable number, because it can be changed into a prime (655940731) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 468165 + ... + 469563.

It is an arithmetic number, because the mean of its divisors is an integer number (11022375).

Almost surely, 2^655940736 is an apocalyptic number.

655940736 is a gapful number since it is divisible by the number (66) 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 655940736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1058148000).

655940736 is an abundant number, since it is smaller than the sum of its proper divisors (1460355264).

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

655940736 is a wasteful number, since it uses less digits than its factorization.

655940736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467 (or 1452 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 45.

The square root of 655940736 is about 25611.3399883723. The cubic root of 655940736 is about 868.8701305781.

The spelling of 655940736 in words is "six hundred fifty-five million, nine hundred forty thousand, seven hundred thirty-six".