705732728 has 8 divisors (see below), whose sum is σ = 1323248880. Its totient is φ = 352866360.

The previous prime is 705732691. The next prime is 705732733. The reversal of 705732728 is 827237507.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44108288 + ... + 44108303.

It is an arithmetic number, because the mean of its divisors is an integer number (165406110).

Almost surely, 2^705732728 is an apocalyptic number.

It is an amenable number.

705732728 is a deficient number, since it is larger than the sum of its proper divisors (617516152).

705732728 is a wasteful number, since it uses less digits than its factorization.

705732728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88216597 (or 88216593 counting only the distinct ones).

The product of its (nonzero) digits is 164640, while the sum is 41.

The square root of 705732728 is about 26565.6305778726. The cubic root of 705732728 is about 890.3212777726.

The spelling of 705732728 in words is "seven hundred five million, seven hundred thirty-two thousand, seven hundred twenty-eight".