628415 has 4 divisors (see below), whose sum is σ = 754104. Its totient is φ = 502728.

The previous prime is 628399. The next prime is 628423. The reversal of 628415 is 514826.

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 628415 - 2⁴ = 628399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62837 + ... + 62846.

It is an arithmetic number, because the mean of its divisors is an integer number (188526).

2⁶²⁸⁴¹⁵ is an apocalyptic number.

628415 is a deficient number, since it is larger than the sum of its proper divisors (125689).

628415 is a wasteful number, since it uses less digits than its factorization.

628415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125688.

The product of its digits is 1920, while the sum is 26.

The square root of 628415 is about 792.7263083814. The cubic root of 628415 is about 85.6542363799.

The spelling of 628415 in words is "six hundred twenty-eight thousand, four hundred fifteen".