628868467 has 4 divisors (see below), whose sum is σ = 628931160. Its totient is φ = 628805776.

The previous prime is 628868453. The next prime is 628868477. The reversal of 628868467 is 764868826.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a 4-Lehmer number, since φ(628868467) divides (628868467-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 628868467 - 2¹⁵ = 628835699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628868477) 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, 12538 + ... + 37615.

It is an arithmetic number, because the mean of its divisors is an integer number (157232790).

It is a Poulet number, since it divides 2^628868466-1.

Almost surely, 2^628868467 is an apocalyptic number.

628868467 is the 12539-th decagonal number.

628868467 is a deficient number, since it is larger than the sum of its proper divisors (62693).

628868467 is a wasteful number, since it uses less digits than its factorization.

628868467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62692.

The product of its digits is 6193152, while the sum is 55.

The square root of 628868467 is about 25077.2499887847. The cubic root of 628868467 is about 856.7483424947.

It can be divided in two parts, 6288 and 68467, that multiplied together give a triangular number (430520496 = T₂₉₃₄₃).

The spelling of 628868467 in words is "six hundred twenty-eight million, eight hundred sixty-eight thousand, four hundred sixty-seven".