2403920 has 40 divisors (see below), whose sum is σ = 5654400. Its totient is φ = 950400.

The previous prime is 2403913. The next prime is 2403931. The reversal of 2403920 is 293042.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2403892 and 2403901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11981 + ... + 12179.

It is an arithmetic number, because the mean of its divisors is an integer number (141360).

2^2403920 is an apocalyptic number.

2403920 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 2403920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2827200).

2403920 is an abundant number, since it is smaller than the sum of its proper divisors (3250480).

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

2403920 is a wasteful number, since it uses less digits than its factorization.

2403920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363 (or 357 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 2403920 is about 1550.4579968513. The cubic root of 2403920 is about 133.9594441759.

Adding to 2403920 its reverse (293042), we get a palindrome (2696962).

The spelling of 2403920 in words is "two million, four hundred three thousand, nine hundred twenty".