628507487 has 4 divisors (see below), whose sum is σ = 629404776. Its totient is φ = 627610200.

The previous prime is 628507483. The next prime is 628507511. The reversal of 628507487 is 784705826.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 784705826 = 2 ⋅392352913.

It is a cyclic number.

It is not a de Polignac number, because 628507487 - 2² = 628507483 is a prime.

It is a super-2 number, since 2×628507487² = 790043322430110338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628507483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 447593 + ... + 448994.

It is an arithmetic number, because the mean of its divisors is an integer number (157351194).

Almost surely, 2^628507487 is an apocalyptic number.

628507487 is a deficient number, since it is larger than the sum of its proper divisors (897289).

628507487 is an equidigital number, since it uses as much as digits as its factorization.

628507487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897288.

The product of its (nonzero) digits is 752640, while the sum is 47.

The square root of 628507487 is about 25070.0515954794. The cubic root of 628507487 is about 856.5843822885.

The spelling of 628507487 in words is "six hundred twenty-eight million, five hundred seven thousand, four hundred eighty-seven".