2400021420 has 48 divisors (see below), whose sum is σ = 6740418048. Its totient is φ = 638066880.

The previous prime is 2400021409. The next prime is 2400021473. The reversal of 2400021420 is 241200042.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2400021420.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40564 + ... + 80283.

It is an arithmetic number, because the mean of its divisors is an integer number (140425376).

Almost surely, 2^2400021420 is an apocalyptic number.

2400021420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2400021420 is an abundant number, since it is smaller than the sum of its proper divisors (4340396628).

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

2400021420 is a wasteful number, since it uses less digits than its factorization.

2400021420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121190 (or 121188 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 2400021420 is about 48990.0134721353. The cubic root of 2400021420 is about 1338.8698832785.

Adding to 2400021420 its reverse (241200042), we get a palindrome (2641221462).

The spelling of 2400021420 in words is "two billion, four hundred million, twenty-one thousand, four hundred twenty".