2020400 has 30 divisors (see below), whose sum is σ = 4854972. Its totient is φ = 808000.

The previous prime is 2020393. The next prime is 2020409. The reversal of 2020400 is 40202.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is not an unprimeable number, because it can be changed into a prime (2020409) 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, 2126 + ... + 2925.

2^2020400 is an apocalyptic number.

2020400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2020400 is an abundant number, since it is smaller than the sum of its proper divisors (2834572).

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

2020400 is a wasteful number, since it uses less digits than its factorization.

2020400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5069 (or 5058 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 8.

The square root of 2020400 is about 1421.4077528985. The cubic root of 2020400 is about 126.4190298753.

Adding to 2020400 its reverse (40202), we get a palindrome (2060602).

The spelling of 2020400 in words is "two million, twenty thousand, four hundred".