1000601620 has 24 divisors (see below), whose sum is σ = 2103933384. Its totient is φ = 399732096.

The previous prime is 1000601599. The next prime is 1000601621. The reversal of 1000601620 is 261060001.

It can be written as a sum of positive squares in 4 ways, for example, as 263153284 + 737448336 = 16222^2 + 27156^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1000601594 and 1000601603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000601621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15447 + ... + 47326.

It is an arithmetic number, because the mean of its divisors is an integer number (87663891).

Almost surely, 2^1000601620 is an apocalyptic number.

1000601620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000601620 is an abundant number, since it is smaller than the sum of its proper divisors (1103331764).

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

1000601620 is a wasteful number, since it uses less digits than its factorization.

1000601620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63579 (or 63577 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1000601620 is about 31632.2876188239. The cubic root of 1000601620 is about 1000.2004997971.

Adding to 1000601620 its reverse (261060001), we get a palindrome (1261661621).

The spelling of 1000601620 in words is "one billion, six hundred one thousand, six hundred twenty".