1234400020 has 48 divisors (see below), whose sum is σ = 2968011648. Its totient is φ = 422444160.

The previous prime is 1234400017. The next prime is 1234400021. The reversal of 1234400020 is 200044321.

It is a junction number, because it is equal to n+sod(n) for n = 1234399967 and 1234400003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1234400021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70990 + ... + 86650.

It is an arithmetic number, because the mean of its divisors is an integer number (61833576).

Almost surely, 2^1234400020 is an apocalyptic number.

1234400020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1234400020 is an abundant number, since it is smaller than the sum of its proper divisors (1733611628).

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

1234400020 is a wasteful number, since it uses less digits than its factorization.

1234400020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16240 (or 16238 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 1234400020 is about 35134.0293732444. The cubic root of 1234400020 is about 1072.7173544259.

Adding to 1234400020 its reverse (200044321), we get a palindrome (1434444341).

The spelling of 1234400020 in words is "one billion, two hundred thirty-four million, four hundred thousand, twenty".