7622440 has 48 divisors (see below), whose sum is σ = 19955700. Its totient is φ = 2612736.

The previous prime is 7622431. The next prime is 7622449. The reversal of 7622440 is 442267.

It is an interprime number because it is at equal distance from previous prime (7622431) and next prime (7622449).

It can be written as a sum of positive squares in 2 ways, for example, as 7606564 + 15876 = 2758^2 + 126^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7622449) 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 11 ways as a sum of consecutive naturals, for example, 16 + ... + 3904.

Almost surely, 2^7622440 is an apocalyptic number.

7622440 is a gapful number since it is divisible by the number (70) 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 7622440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9977850).

7622440 is an abundant number, since it is smaller than the sum of its proper divisors (12333260).

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

7622440 is a wasteful number, since it uses less digits than its factorization.

7622440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3914 (or 3903 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 7622440 is about 2760.8766723633. The cubic root of 7622440 is about 196.8028295140.

The spelling of 7622440 in words is "seven million, six hundred twenty-two thousand, four hundred forty".