620878 has 4 divisors (see below), whose sum is σ = 931320. Its totient is φ = 310438.

The previous prime is 620869. The next prime is 620887. The reversal of 620878 is 878026.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (620869) and next prime (620887).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 155218 + ... + 155221.

It is an arithmetic number, because the mean of its divisors is an integer number (232830).

2⁶²⁰⁸⁷⁸ is an apocalyptic number.

620878 is a deficient number, since it is larger than the sum of its proper divisors (310442).

620878 is a wasteful number, since it uses less digits than its factorization.

620878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310441.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 620878 is about 787.9581207145. The cubic root of 620878 is about 85.3104220446.

The spelling of 620878 in words is "six hundred twenty thousand, eight hundred seventy-eight".