620428 has 12 divisors (see below), whose sum is σ = 1096480. Its totient is φ = 307152.

The previous prime is 620413. The next prime is 620429. The reversal of 620428 is 824026.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 620399 and 620408.

It is not an unprimeable number, because it can be changed into a prime (620429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276 + ... + 1147.

2⁶²⁰⁴²⁸ is an apocalyptic number.

It is an amenable number.

620428 is a deficient number, since it is larger than the sum of its proper divisors (476052).

620428 is a wasteful number, since it uses less digits than its factorization.

620428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536 (or 1534 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 620428 is about 787.6725207851. The cubic root of 620428 is about 85.2898066320.

The spelling of 620428 in words is "six hundred twenty thousand, four hundred twenty-eight".