427720100 has 18 divisors (see below), whose sum is σ = 928152834. Its totient is φ = 171088000.

The previous prime is 427720099. The next prime is 427720103. The reversal of 427720100 is 1027724.

It can be written as a sum of positive squares in 3 ways, for example, as 76457536 + 351262564 = 8744^2 + 18742^2 .

It is not an unprimeable number, because it can be changed into a prime (427720103) 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, 2138501 + ... + 2138700.

Almost surely, 2^427720100 is an apocalyptic number.

It is an amenable number.

427720100 is an abundant number, since it is smaller than the sum of its proper divisors (500432734).

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

427720100 is a wasteful number, since it uses less digits than its factorization.

427720100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4277215 (or 4277208 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 427720100 is about 20681.3950206460. The cubic root of 427720100 is about 753.4478880972.

Adding to 427720100 its reverse (1027724), we get a palindrome (428747824).

The spelling of 427720100 in words is "four hundred twenty-seven million, seven hundred twenty thousand, one hundred".