7940385 has 48 divisors (see below), whose sum is σ = 14938560. Its totient is φ = 3888000.

The previous prime is 7940381. The next prime is 7940389. The reversal of 7940385 is 5830497.

It is an interprime number because it is at equal distance from previous prime (7940381) and next prime (7940389).

It is not a de Polignac number, because 7940385 - 2² = 7940381 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (7940381) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31510 + ... + 31760.

It is an arithmetic number, because the mean of its divisors is an integer number (311220).

Almost surely, 2^7940385 is an apocalyptic number.

It is an amenable number.

7940385 is a deficient number, since it is larger than the sum of its proper divisors (6998175).

7940385 is a wasteful number, since it uses less digits than its factorization.

7940385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318 (or 315 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 7940385 is about 2817.8688755867. The cubic root of 7940385 is about 199.5019691893.

The spelling of 7940385 in words is "seven million, nine hundred forty thousand, three hundred eighty-five".