708721428 has 48 divisors (see below), whose sum is σ = 1670142656. Its totient is φ = 233902080.

The previous prime is 708721427. The next prime is 708721439. The reversal of 708721428 is 824127807.

708721428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (708721427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 614100 + ... + 615252.

Almost surely, 2^708721428 is an apocalyptic number.

It is an amenable number.

708721428 is an abundant number, since it is smaller than the sum of its proper divisors (961421228).

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

708721428 is a wasteful number, since it uses less digits than its factorization.

708721428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624 (or 1622 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 39.

The square root of 708721428 is about 26621.8224019318. The cubic root of 708721428 is about 891.5763118196.

The spelling of 708721428 in words is "seven hundred eight million, seven hundred twenty-one thousand, four hundred twenty-eight".