7636440 has 64 divisors (see below), whose sum is σ = 26184960. Its totient is φ = 1745280.

The previous prime is 7636411. The next prime is 7636441. The reversal of 7636440 is 446367.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 7636398 and 7636407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7636441) 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 15 ways as a sum of consecutive naturals, for example, 3706 + ... + 5385.

It is an arithmetic number, because the mean of its divisors is an integer number (409140).

Almost surely, 2^7636440 is an apocalyptic number.

7636440 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7636440 is an abundant number, since it is smaller than the sum of its proper divisors (18548520).

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

7636440 is a wasteful number, since it uses less digits than its factorization.

7636440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9112 (or 9108 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 7636440 is about 2763.4109357821. The cubic root of 7636440 is about 196.9232439089.

The spelling of 7636440 in words is "seven million, six hundred thirty-six thousand, four hundred forty".