7628450281 has 9 divisors (see below), whose sum is σ = 7689105021. Its totient is φ = 7568272332.

The previous prime is 7628450191. The next prime is 7628450299. The reversal of 7628450281 is 1820548267.

It is a happy number.

The square root of 7628450281 is 87341.

It is a perfect power (a square), and thus also a powerful number.

It is a de Polignac number, because none of the positive numbers 2^k-7628450281 is a prime.

It is a super-2 number, since 2×7628450281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7628457281) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 14585686 + ... + 14586208.

Almost surely, 2^7628450281 is an apocalyptic number.

7628450281 is the 87341-st square number.

7628450281 is the 43671-st centered octagonal number.

It is an amenable number.

7628450281 is a deficient number, since it is larger than the sum of its proper divisors (60654740).

7628450281 is an frugal number, since it uses more digits than its factorization.

7628450281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380 (or 690 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 43.

The cubic root of 7628450281 is about 1968.5454215697.

The spelling of 7628450281 in words is "seven billion, six hundred twenty-eight million, four hundred fifty thousand, two hundred eighty-one".