628750461 has 4 divisors (see below), whose sum is σ = 838333952. Its totient is φ = 419166972.

The previous prime is 628750459. The next prime is 628750469. The reversal of 628750461 is 164057826.

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 not a de Polignac number, because 628750461 - 2¹ = 628750459 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 (628750469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104791741 + ... + 104791746.

It is an arithmetic number, because the mean of its divisors is an integer number (209583488).

Almost surely, 2^628750461 is an apocalyptic number.

It is an amenable number.

628750461 is a deficient number, since it is larger than the sum of its proper divisors (209583491).

628750461 is a wasteful number, since it uses less digits than its factorization.

628750461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209583490.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 628750461 is about 25074.8970287018. The cubic root of 628750461 is about 856.6947500639.

The spelling of 628750461 in words is "six hundred twenty-eight million, seven hundred fifty thousand, four hundred sixty-one".