620728 has 8 divisors (see below), whose sum is σ = 1163880. Its totient is φ = 310360.

The previous prime is 620717. The next prime is 620731. The reversal of 620728 is 827026.

620728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 38788 + ... + 38803.

It is an arithmetic number, because the mean of its divisors is an integer number (145485).

2⁶²⁰⁷²⁸ is an apocalyptic number.

It is an amenable number.

620728 is a deficient number, since it is larger than the sum of its proper divisors (543152).

620728 is a wasteful number, since it uses less digits than its factorization.

620728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77597 (or 77593 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 620728 is about 787.8629322414. The cubic root of 620728 is about 85.3035513475.

The spelling of 620728 in words is "six hundred twenty thousand, seven hundred twenty-eight".