1203663420 has 144 divisors (see below), whose sum is σ = 3781814400. Its totient is φ = 309685248.

The previous prime is 1203663403. The next prime is 1203663449. The reversal of 1203663420 is 243663021.

1203663420 is a `hidden beast` number, since 1 + 2 + 0 + 3 + 6 + 634 + 20 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 616606 + ... + 618554.

It is an arithmetic number, because the mean of its divisors is an integer number (26262600).

Almost surely, 2^1203663420 is an apocalyptic number.

1203663420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1203663420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1890907200).

1203663420 is an abundant number, since it is smaller than the sum of its proper divisors (2578150980).

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

1203663420 is a wasteful number, since it uses less digits than its factorization.

1203663420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2084 (or 2079 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 1203663420 is about 34693.8527696190. The cubic root of 1203663420 is about 1063.7388496868.

The spelling of 1203663420 in words is "one billion, two hundred three million, six hundred sixty-three thousand, four hundred twenty".