728623247 has 8 divisors (see below), whose sum is σ = 841618512. Its totient is φ = 623420800.

The previous prime is 728623237. The next prime is 728623249. The reversal of 728623247 is 742326827.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 728623247 - 2⁸ = 728622991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728623249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1948004 + ... + 1948377.

It is an arithmetic number, because the mean of its divisors is an integer number (105202314).

Almost surely, 2^728623247 is an apocalyptic number.

728623247 is a deficient number, since it is larger than the sum of its proper divisors (112995265).

728623247 is a wasteful number, since it uses less digits than its factorization.

728623247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3896409.

The product of its digits is 225792, while the sum is 41.

The square root of 728623247 is about 26993.0221909293. The cubic root of 728623247 is about 899.8449308965.

The spelling of 728623247 in words is "seven hundred twenty-eight million, six hundred twenty-three thousand, two hundred forty-seven".