3402240 has 80 divisors (see below), whose sum is σ = 10901088. Its totient is φ = 905216.

The previous prime is 3402239. The next prime is 3402241. The reversal of 3402240 is 422043.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3402239) and next prime (3402241).

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-4 number, since 4×3402240⁴ (a number of 27 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (3402241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7459 + ... + 7901.

Almost surely, 2^3402240 is an apocalyptic number.

3402240 is a gapful number since it is divisible by the number (30) 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 3402240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5450544).

3402240 is an abundant number, since it is smaller than the sum of its proper divisors (7498848).

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

3402240 is an equidigital number, since it uses as much as digits as its factorization.

3402240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469 (or 453 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 3402240 is about 1844.5161967302. The cubic root of 3402240 is about 150.4024746839.

Adding to 3402240 its reverse (422043), we get a palindrome (3824283).

The spelling of 3402240 in words is "three million, four hundred two thousand, two hundred forty".