2403721920 has 112 divisors (see below), whose sum is σ = 8033552640. Its totient is φ = 607251456.

The previous prime is 2403721913. The next prime is 2403721921. The reversal of 2403721920 is 291273042.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (2403721921) 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, 47652 + ... + 84131.

Almost surely, 2^2403721920 is an apocalyptic number.

2403721920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2403721920 is an abundant number, since it is smaller than the sum of its proper divisors (5629830720).

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

2403721920 is a wasteful number, since it uses less digits than its factorization.

2403721920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131822 (or 131812 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 2403721920 is about 49027.7668265647. The cubic root of 2403721920 is about 1339.5576471131.

Adding to 2403721920 its reverse (291273042), we get a palindrome (2694994962).

The spelling of 2403721920 in words is "two billion, four hundred three million, seven hundred twenty-one thousand, nine hundred twenty".