628881550 has 48 divisors (see below), whose sum is σ = 1288805904. Its totient is φ = 226400000.

The previous prime is 628881529. The next prime is 628881553. The reversal of 628881550 is 55188826.

It is a super-3 number, since 3×628881550³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 628881497 and 628881506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628881553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49890 + ... + 61210.

It is an arithmetic number, because the mean of its divisors is an integer number (26850123).

Almost surely, 2^628881550 is an apocalyptic number.

628881550 is an abundant number, since it is smaller than the sum of its proper divisors (659924354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

628881550 is a wasteful number, since it uses less digits than its factorization.

628881550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11445 (or 11440 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 43.

The square root of 628881550 is about 25077.5108413893. The cubic root of 628881550 is about 856.7542837269.

The spelling of 628881550 in words is "six hundred twenty-eight million, eight hundred eighty-one thousand, five hundred fifty".