620433540 has 96 divisors (see below), whose sum is σ = 1996848000. Its totient is φ = 159739776.

The previous prime is 620433523. The next prime is 620433553. The reversal of 620433540 is 45334026.

620433540 is a `hidden beast` number, since 620 + 4 + 3 + 35 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4150 + ... + 35469.

It is an arithmetic number, because the mean of its divisors is an integer number (20800500).

Almost surely, 2^620433540 is an apocalyptic number.

620433540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 620433540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (998424000).

620433540 is an abundant number, since it is smaller than the sum of its proper divisors (1376414460).

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

620433540 is a wasteful number, since it uses less digits than its factorization.

620433540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39666 (or 39658 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 620433540 is about 24908.5033673242. The cubic root of 620433540 is about 852.9006049126.

Adding to 620433540 its reverse (45334026), we get a palindrome (665767566).

The spelling of 620433540 in words is "six hundred twenty million, four hundred thirty-three thousand, five hundred forty".