620191872 has 192 divisors, whose sum is σ = 1890345600. Its totient is φ = 194777088.

The previous prime is 620191823. The next prime is 620191889. The reversal of 620191872 is 278191026.

620191872 is a `hidden beast` number, since 620 + 19 + 18 + 7 + 2 = 666.

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 an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2358013 + ... + 2358275.

It is an arithmetic number, because the mean of its divisors is an integer number (9845550).

Almost surely, 2^620191872 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 620191872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (945172800).

620191872 is an abundant number, since it is smaller than the sum of its proper divisors (1270153728).

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

620191872 is a wasteful number, since it uses less digits than its factorization.

620191872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395 (or 380 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 620191872 is about 24903.6517804116. The cubic root of 620191872 is about 852.7898514164.

The spelling of 620191872 in words is "six hundred twenty million, one hundred ninety-one thousand, eight hundred seventy-two".