628132815 has 12 divisors (see below), whose sum is σ = 1088763624. Its totient is φ = 335004144.

The previous prime is 628132787. The next prime is 628132823. The reversal of 628132815 is 518231826.

It is a happy number.

628132815 is a `hidden beast` number, since 628 + 1 + 3 + 28 + 1 + 5 = 666.

It is not a de Polignac number, because 628132815 - 2⁸ = 628132559 is a prime.

It is a super-3 number, since 3×628132815³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 628132815.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6979209 + ... + 6979298.

It is an arithmetic number, because the mean of its divisors is an integer number (90730302).

Almost surely, 2^628132815 is an apocalyptic number.

628132815 is a deficient number, since it is larger than the sum of its proper divisors (460630809).

628132815 is a wasteful number, since it uses less digits than its factorization.

628132815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13958518 (or 13958515 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 628132815 is about 25062.5779799286. The cubic root of 628132815 is about 856.4141366483.

The spelling of 628132815 in words is "six hundred twenty-eight million, one hundred thirty-two thousand, eight hundred fifteen".