620458 has 4 divisors (see below), whose sum is σ = 930690. Its totient is φ = 310228.

The previous prime is 620441. The next prime is 620461. The reversal of 620458 is 854026.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 854026 = 2 ⋅427013.

It can be written as a sum of positive squares in only one way, i.e., 619369 + 1089 = 787^2 + 33^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155113 + ... + 155116.

2⁶²⁰⁴⁵⁸ is an apocalyptic number.

620458 is a deficient number, since it is larger than the sum of its proper divisors (310232).

620458 is a wasteful number, since it uses less digits than its factorization.

620458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310231.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 620458 is about 787.6915640021. The cubic root of 620458 is about 85.2911813029.

The spelling of 620458 in words is "six hundred twenty thousand, four hundred fifty-eight".