708256440 has 256 divisors, whose sum is σ = 2455833600. Its totient is φ = 181440000.

The previous prime is 708256429. The next prime is 708256447. The reversal of 708256440 is 44652807.

708256440 is a `hidden beast` number, since 7 + 0 + 8 + 2 + 5 + 644 + 0 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 708256395 and 708256404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (708256447) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4690365 + ... + 4690515.

It is an arithmetic number, because the mean of its divisors is an integer number (9593100).

Almost surely, 2^708256440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 708256440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1227916800).

708256440 is an abundant number, since it is smaller than the sum of its proper divisors (1747577160).

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

708256440 is a wasteful number, since it uses less digits than its factorization.

708256440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315 (or 305 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 708256440 is about 26613.0877577180. The cubic root of 708256440 is about 891.3812831530.

The spelling of 708256440 in words is "seven hundred eight million, two hundred fifty-six thousand, four hundred forty".