628796387 has 4 divisors (see below), whose sum is σ = 630057000. Its totient is φ = 627535776.

The previous prime is 628796369. The next prime is 628796411. The reversal of 628796387 is 783697826.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 628796387 - 2¹² = 628792291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628796347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 629558 + ... + 630555.

It is an arithmetic number, because the mean of its divisors is an integer number (157514250).

Almost surely, 2^628796387 is an apocalyptic number.

628796387 is a deficient number, since it is larger than the sum of its proper divisors (1260613).

628796387 is a wasteful number, since it uses less digits than its factorization.

628796387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260612.

The product of its digits is 6096384, while the sum is 56.

The square root of 628796387 is about 25075.8127884222. The cubic root of 628796387 is about 856.7156081561.

The spelling of 628796387 in words is "six hundred twenty-eight million, seven hundred ninety-six thousand, three hundred eighty-seven".