620408 has 8 divisors (see below), whose sum is σ = 1163280. Its totient is φ = 310200.

The previous prime is 620401. The next prime is 620413. The reversal of 620408 is 804026.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 620408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620401) by changing a digit.

620408 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38768 + ... + 38783.

It is an arithmetic number, because the mean of its divisors is an integer number (145410).

2⁶²⁰⁴⁰⁸ is an apocalyptic number.

It is an amenable number.

620408 is a deficient number, since it is larger than the sum of its proper divisors (542872).

620408 is a wasteful number, since it uses less digits than its factorization.

620408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77557 (or 77553 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 620408 is about 787.6598250514. The cubic root of 620408 is about 85.2888901601.

The spelling of 620408 in words is "six hundred twenty thousand, four hundred eight".