728240425 has 24 divisors (see below), whose sum is σ = 988954560. Its totient is φ = 527563200.

The previous prime is 728240371. The next prime is 728240459. The reversal of 728240425 is 524042827.

It is a de Polignac number, because none of the positive numbers 2^k-728240425 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67291 + ... + 77359.

It is an arithmetic number, because the mean of its divisors is an integer number (41206440).

Almost surely, 2^728240425 is an apocalyptic number.

It is an amenable number.

728240425 is a deficient number, since it is larger than the sum of its proper divisors (260714135).

728240425 is a wasteful number, since it uses less digits than its factorization.

728240425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10353 (or 10348 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 34.

The square root of 728240425 is about 26985.9301303476. The cubic root of 728240425 is about 899.6873090685.

The spelling of 728240425 in words is "seven hundred twenty-eight million, two hundred forty thousand, four hundred twenty-five".