2403720 has 96 divisors (see below), whose sum is σ = 8536320. Its totient is φ = 581760.

The previous prime is 2403701. The next prime is 2403773. The reversal of 2403720 is 273042.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a d-powerful number, because it can be written as 2⁵ + 4¹⁰ + 0 + 3¹² + 7⁷ + 2⁷ + 0 .

It is a junction number, because it is equal to n+sod(n) for n = 2403693 and 2403702.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3657 + ... + 4263.

It is an arithmetic number, because the mean of its divisors is an integer number (88920).

2^2403720 is an apocalyptic number.

2403720 is a gapful number since it is divisible by the number (20) 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 2403720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4268160).

2403720 is an abundant number, since it is smaller than the sum of its proper divisors (6132600).

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

2403720 is a wasteful number, since it uses less digits than its factorization.

2403720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635 (or 628 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 2403720 is about 1550.3934984384. The cubic root of 2403720 is about 133.9557290451.

Adding to 2403720 its reverse (273042), we get a palindrome (2676762).

The spelling of 2403720 in words is "two million, four hundred three thousand, seven hundred twenty".