7620440 has 32 divisors (see below), whose sum is σ = 17442000. Its totient is φ = 2995584.

The previous prime is 7620427. The next prime is 7620443. The reversal of 7620440 is 440267.

It is a super-2 number, since 2×7620440² = 116142211587200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7620443) 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, 746 + ... + 3974.

Almost surely, 2^7620440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7620440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8721000).

7620440 is an abundant number, since it is smaller than the sum of its proper divisors (9821560).

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

7620440 is a wasteful number, since it uses less digits than its factorization.

7620440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3299 (or 3295 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 7620440 is about 2760.5144448092. The cubic root of 7620440 is about 196.7856154247.

The spelling of 7620440 in words is "seven million, six hundred twenty thousand, four hundred forty".