620421288 has 64 divisors (see below), whose sum is σ = 1655769600. Its totient is φ = 193152960.

The previous prime is 620421283. The next prime is 620421293. The reversal of 620421288 is 882124026.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (620421283) and next prime (620421293).

It is not an unprimeable number, because it can be changed into a prime (620421283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22795 + ... + 41957.

It is an arithmetic number, because the mean of its divisors is an integer number (25871400).

Almost surely, 2^620421288 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 620421288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (827884800).

620421288 is an abundant number, since it is smaller than the sum of its proper divisors (1035348312).

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

620421288 is a wasteful number, since it uses less digits than its factorization.

620421288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19262 (or 19258 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 620421288 is about 24908.2574260023. The cubic root of 620421288 is about 852.8949906626.

The spelling of 620421288 in words is "six hundred twenty million, four hundred twenty-one thousand, two hundred eighty-eight".