720749158 has 4 divisors (see below), whose sum is σ = 1081123740. Its totient is φ = 360374578.

The previous prime is 720749149. The next prime is 720749177. The reversal of 720749158 is 851947027.

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

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, 180187288 + ... + 180187291.

It is an arithmetic number, because the mean of its divisors is an integer number (270280935).

Almost surely, 2^720749158 is an apocalyptic number.

720749158 is a deficient number, since it is larger than the sum of its proper divisors (360374582).

720749158 is a wasteful number, since it uses less digits than its factorization.

720749158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360374581.

The product of its (nonzero) digits is 141120, while the sum is 43.

The square root of 720749158 is about 26846.7718357347. The cubic root of 720749158 is about 896.5917008370.

It can be divided in two parts, 7207 and 49158, that added together give a palindrome (56365).

The spelling of 720749158 in words is "seven hundred twenty million, seven hundred forty-nine thousand, one hundred fifty-eight".