3620820931 has 32 divisors (see below), whose sum is σ = 4671249408. Its totient is φ = 2727838080.

The previous prime is 3620820913. The next prime is 3620820941. The reversal of 3620820931 is 1390280263.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 3620820931 - 2¹³ = 3620812739 is a prime.

It is a super-4 number, since 4×3620820931⁴ (a number of 39 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (3620820911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 471301 + ... + 478921.

It is an arithmetic number, because the mean of its divisors is an integer number (145976544).

Almost surely, 2^3620820931 is an apocalyptic number.

3620820931 is a deficient number, since it is larger than the sum of its proper divisors (1050428477).

3620820931 is a wasteful number, since it uses less digits than its factorization.

3620820931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7891.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 3620820931 is about 60173.2576066811. The cubic root of 3620820931 is about 1535.5678675037.

The spelling of 3620820931 in words is "three billion, six hundred twenty million, eight hundred twenty thousand, nine hundred thirty-one".