7664240 has 20 divisors (see below), whose sum is σ = 17819544. Its totient is φ = 3065664.

The previous prime is 7664231. The next prime is 7664249. The reversal of 7664240 is 424667.

It is an interprime number because it is at equal distance from previous prime (7664231) and next prime (7664249).

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7664249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47822 + ... + 47981.

Almost surely, 2^7664240 is an apocalyptic number.

It is an amenable number.

7664240 is an abundant number, since it is smaller than the sum of its proper divisors (10155304).

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

7664240 is a wasteful number, since it uses less digits than its factorization.

7664240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95816 (or 95810 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 7664240 is about 2768.4363817867. The cubic root of 7664240 is about 197.1619169218.

The spelling of 7664240 in words is "seven million, six hundred sixty-four thousand, two hundred forty".