7940455 has 4 divisors (see below), whose sum is σ = 9528552. Its totient is φ = 6352360.

The previous prime is 7940447. The next prime is 7940467. The reversal of 7940455 is 5540497.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 7940455 - 2³ = 7940447 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7940455.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 794041 + ... + 794050.

It is an arithmetic number, because the mean of its divisors is an integer number (2382138).

Almost surely, 2^7940455 is an apocalyptic number.

7940455 is a deficient number, since it is larger than the sum of its proper divisors (1588097).

7940455 is a wasteful number, since it uses less digits than its factorization.

7940455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1588096.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 7940455 is about 2817.8812962934. The cubic root of 7940455 is about 199.5025554370.

The spelling of 7940455 in words is "seven million, nine hundred forty thousand, four hundred fifty-five".