728758042 has 4 divisors (see below), whose sum is σ = 1093137066. Its totient is φ = 364379020.

The previous prime is 728758027. The next prime is 728758049. The reversal of 728758042 is 240857827.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 588596121 + 140161921 = 24261^2 + 11839^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 728758042.

It is not an unprimeable number, because it can be changed into a prime (728758049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 182189509 + ... + 182189512.

Almost surely, 2^728758042 is an apocalyptic number.

728758042 is a deficient number, since it is larger than the sum of its proper divisors (364379024).

728758042 is a wasteful number, since it uses less digits than its factorization.

728758042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364379023.

The product of its (nonzero) digits is 250880, while the sum is 43.

The square root of 728758042 is about 26995.5189244437. The cubic root of 728758042 is about 899.9004177885.

The spelling of 728758042 in words is "seven hundred twenty-eight million, seven hundred fifty-eight thousand, forty-two".