628699506 has 32 divisors (see below), whose sum is σ = 1281206400. Its totient is φ = 205628544.

The previous prime is 628699501. The next prime is 628699541. The reversal of 628699506 is 605996826.

628699506 = 461² + 462² + ... + 1256².

628699506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (628699501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83556 + ... + 90768.

It is an arithmetic number, because the mean of its divisors is an integer number (40037700).

Almost surely, 2^628699506 is an apocalyptic number.

628699506 is an abundant number, since it is smaller than the sum of its proper divisors (652506894).

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

628699506 is a wasteful number, since it uses less digits than its factorization.

628699506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7490.

The product of its (nonzero) digits is 1399680, while the sum is 51.

The square root of 628699506 is about 25073.8809520983. The cubic root of 628699506 is about 856.6716067752.

The spelling of 628699506 in words is "six hundred twenty-eight million, six hundred ninety-nine thousand, five hundred six".