728051667 has 16 divisors (see below), whose sum is σ = 1133018112. Its totient is φ = 407177280.

The previous prime is 728051659. The next prime is 728051677. The reversal of 728051667 is 766150827.

It is not a de Polignac number, because 728051667 - 2³ = 728051659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (728051677) 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, 367834 + ... + 369807.

It is an arithmetic number, because the mean of its divisors is an integer number (70813632).

Almost surely, 2^728051667 is an apocalyptic number.

728051667 is a deficient number, since it is larger than the sum of its proper divisors (404966445).

728051667 is a wasteful number, since it uses less digits than its factorization.

728051667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737698.

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 728051667 is about 26982.4325626879. The cubic root of 728051667 is about 899.6095701579.

The spelling of 728051667 in words is "seven hundred twenty-eight million, fifty-one thousand, six hundred sixty-seven".