620022240 has 72 divisors (see below), whose sum is σ = 2115830808. Its totient is φ = 165338880.

The previous prime is 620022223. The next prime is 620022241. The reversal of 620022240 is 42220026.

It is a happy number.

620022240 is a `hidden beast` number, since 620 + 0 + 2 + 2 + 2 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620022241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 213846 + ... + 216725.

It is an arithmetic number, because the mean of its divisors is an integer number (29386539).

Almost surely, 2^620022240 is an apocalyptic number.

620022240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

620022240 is an abundant number, since it is smaller than the sum of its proper divisors (1495808568).

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

620022240 is a wasteful number, since it uses less digits than its factorization.

620022240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430592 (or 430581 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 620022240 is about 24900.2457819195. The cubic root of 620022240 is about 852.7120939537.

Adding to 620022240 its reverse (42220026), we get a palindrome (662242266).

The spelling of 620022240 in words is "six hundred twenty million, twenty-two thousand, two hundred forty".