620903808 has 192 divisors, whose sum is σ = 2098156320. Its totient is φ = 172523520.

The previous prime is 620903797. The next prime is 620903821. The reversal of 620903808 is 808309026.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 297328 + ... + 299408.

Almost surely, 2^620903808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 620903808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1049078160).

620903808 is an abundant number, since it is smaller than the sum of its proper divisors (1477252512).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

620903808 is a wasteful number, since it uses less digits than its factorization.

620903808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2145 (or 2130 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 620903808 is about 24917.9414880122. The cubic root of 620903808 is about 853.1160405934.

The spelling of 620903808 in words is "six hundred twenty million, nine hundred three thousand, eight hundred eight".