720404027 has 6 divisors (see below), whose sum is σ = 838021068. Its totient is φ = 617489124.

The previous prime is 720404021. The next prime is 720404029.

720404027 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-720404027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 720403987 and 720404005.

It is not an unprimeable number, because it can be changed into a prime (720404021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7351013 + ... + 7351110.

It is an arithmetic number, because the mean of its divisors is an integer number (139670178).

Almost surely, 2^720404027 is an apocalyptic number.

720404027 is a deficient number, since it is larger than the sum of its proper divisors (117617041).

720404027 is a wasteful number, since it uses less digits than its factorization.

720404027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14702137 (or 14702130 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 26.

The square root of 720404027 is about 26840.3432727676. The cubic root of 720404027 is about 896.4485668992.

It can be divided in two parts, 72040 and 4027, that added together give a palindrome (76067).

The spelling of 720404027 in words is "seven hundred twenty million, four hundred four thousand, twenty-seven".