728670542 has 4 divisors (see below), whose sum is σ = 1093005816. Its totient is φ = 364335270.

The previous prime is 728670511. The next prime is 728670587. The reversal of 728670542 is 245076827.

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

It is a self number, because there is not a number n which added to its sum of digits gives 728670542.

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, 182167634 + ... + 182167637.

It is an arithmetic number, because the mean of its divisors is an integer number (273251454).

Almost surely, 2^728670542 is an apocalyptic number.

728670542 is a deficient number, since it is larger than the sum of its proper divisors (364335274).

728670542 is a wasteful number, since it uses less digits than its factorization.

728670542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364335273.

The product of its (nonzero) digits is 188160, while the sum is 41.

The square root of 728670542 is about 26993.8982364534. The cubic root of 728670542 is about 899.8644001468.

The spelling of 728670542 in words is "seven hundred twenty-eight million, six hundred seventy thousand, five hundred forty-two".