628461803 has 4 divisors (see below), whose sum is σ = 661538760. Its totient is φ = 595384848.

The previous prime is 628461793. The next prime is 628461859. The reversal of 628461803 is 308164826.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 308164826 = 2 ⋅154082413.

It is a cyclic number.

It is not a de Polignac number, because 628461803 - 2¹⁸ = 628199659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628461403) 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, 16538450 + ... + 16538487.

It is an arithmetic number, because the mean of its divisors is an integer number (165384690).

Almost surely, 2^628461803 is an apocalyptic number.

628461803 is a deficient number, since it is larger than the sum of its proper divisors (33076957).

628461803 is a wasteful number, since it uses less digits than its factorization.

628461803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33076956.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 628461803 is about 25069.1404519581. The cubic root of 628461803 is about 856.5636277497.

The spelling of 628461803 in words is "six hundred twenty-eight million, four hundred sixty-one thousand, eight hundred three".