63628261 has 4 divisors (see below), whose sum is σ = 65108032. Its totient is φ = 62148492.

The previous prime is 63628231. The next prime is 63628267. The reversal of 63628261 is 16282636.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 63628261 - 2⁷ = 63628133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63628267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 739821 + ... + 739906.

It is an arithmetic number, because the mean of its divisors is an integer number (16277008).

Almost surely, 2^63628261 is an apocalyptic number.

It is an amenable number.

63628261 is a deficient number, since it is larger than the sum of its proper divisors (1479771).

63628261 is a wasteful number, since it uses less digits than its factorization.

63628261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1479770.

The product of its digits is 20736, while the sum is 34.

The square root of 63628261 is about 7976.7324763966. The cubic root of 63628261 is about 399.2240394364.

The spelling of 63628261 in words is "sixty-three million, six hundred twenty-eight thousand, two hundred sixty-one".