2387440 has 40 divisors (see below), whose sum is σ = 6057648. Its totient is φ = 867840.

The previous prime is 2387431. The next prime is 2387447. The reversal of 2387440 is 447832.

2387440 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

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

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 2387399 and 2387408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2387447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 477 + ... + 2236.

2^2387440 is an apocalyptic number.

2387440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2387440 is an abundant number, since it is smaller than the sum of its proper divisors (3670208).

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

2387440 is a wasteful number, since it uses less digits than its factorization.

2387440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737 (or 2731 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 2387440 is about 1545.1342983702. The cubic root of 2387440 is about 133.6526236811.

The spelling of 2387440 in words is "two million, three hundred eighty-seven thousand, four hundred forty".