620408080 has 40 divisors (see below), whose sum is σ = 1443936600. Its totient is φ = 247907328.

The previous prime is 620408057. The next prime is 620408143. The reversal of 620408080 is 80804026.

It can be written as a sum of positive squares in 4 ways, for example, as 39790864 + 580617216 = 6308^2 + 24096^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86886 + ... + 93754.

It is an arithmetic number, because the mean of its divisors is an integer number (36098415).

Almost surely, 2^620408080 is an apocalyptic number.

It is an amenable number.

620408080 is an abundant number, since it is smaller than the sum of its proper divisors (823528520).

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

620408080 is a wasteful number, since it uses less digits than its factorization.

620408080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8011 (or 8005 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 620408080 is about 24907.9922916320. The cubic root of 620408080 is about 852.8889382607. Note that the first 3 decimals are identical.

The spelling of 620408080 in words is "six hundred twenty million, four hundred eight thousand, eighty".