306820100 has 18 divisors (see below), whose sum is σ = 665799834. Its totient is φ = 122728000.

The previous prime is 306820099. The next prime is 306820103. The reversal of 306820100 is 1028603.

It can be written as a sum of positive squares in 3 ways, for example, as 14273284 + 292546816 = 3778^2 + 17104^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (306820103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1534001 + ... + 1534200.

Almost surely, 2^306820100 is an apocalyptic number.

It is an amenable number.

306820100 is an abundant number, since it is smaller than the sum of its proper divisors (358979734).

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

306820100 is a wasteful number, since it uses less digits than its factorization.

306820100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3068215 (or 3068208 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 306820100 is about 17516.2809979744. The cubic root of 306820100 is about 674.4678750858.

Adding to 306820100 its reverse (1028603), we get a palindrome (307848703).

The spelling of 306820100 in words is "three hundred six million, eight hundred twenty thousand, one hundred".