628437545 has 8 divisors (see below), whose sum is σ = 772518600. Its totient is φ = 490487680.

The previous prime is 628437541. The next prime is 628437583. The reversal of 628437545 is 545734826.

It can be written as a sum of positive squares in 4 ways, for example, as 32296489 + 596141056 = 5683^2 + 24416^2 .

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

It is not a de Polignac number, because 628437545 - 2² = 628437541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 628437496 and 628437505.

It is not an unprimeable number, because it can be changed into a prime (628437541) 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, 1532570 + ... + 1532979.

It is an arithmetic number, because the mean of its divisors is an integer number (96564825).

Almost surely, 2^628437545 is an apocalyptic number.

It is an amenable number.

628437545 is a deficient number, since it is larger than the sum of its proper divisors (144081055).

628437545 is a wasteful number, since it uses less digits than its factorization.

628437545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3065595.

The product of its digits is 806400, while the sum is 44.

The square root of 628437545 is about 25068.6566253559. The cubic root of 628437545 is about 856.5526067734.

The spelling of 628437545 in words is "six hundred twenty-eight million, four hundred thirty-seven thousand, five hundred forty-five".