628992041 has 8 divisors (see below), whose sum is σ = 632930760. Its totient is φ = 625061248.

The previous prime is 628992037. The next prime is 628992043. The reversal of 628992041 is 140299826.

628992041 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 375545641 + 253446400 = 19379^2 + 15920^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 628992041 - 2² = 628992037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 628992041.

It is not an unprimeable number, because it can be changed into a prime (628992043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252695 + ... + 255171.

It is an arithmetic number, because the mean of its divisors is an integer number (79116345).

Almost surely, 2^628992041 is an apocalyptic number.

It is an amenable number.

628992041 is a deficient number, since it is larger than the sum of its proper divisors (3938719).

628992041 is a wasteful number, since it uses less digits than its factorization.

628992041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3963.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 628992041 is about 25079.7137344109. The cubic root of 628992041 is about 856.8044564471.

The spelling of 628992041 in words is "six hundred twenty-eight million, nine hundred ninety-two thousand, forty-one".