8240407 has 4 divisors (see below), whose sum is σ = 9417616. Its totient is φ = 7063200.

The previous prime is 8240399. The next prime is 8240431. The reversal of 8240407 is 7040428.

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

It is a cyclic number.

It is not a de Polignac number, because 8240407 - 2³ = 8240399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8240447) 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, 588594 + ... + 588607.

It is an arithmetic number, because the mean of its divisors is an integer number (2354404).

Almost surely, 2^8240407 is an apocalyptic number.

8240407 is a deficient number, since it is larger than the sum of its proper divisors (1177209).

8240407 is a wasteful number, since it uses less digits than its factorization.

8240407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177208.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 8240407 is about 2870.6109105903. The cubic root of 8240407 is about 201.9836522404.

The spelling of 8240407 in words is "eight million, two hundred forty thousand, four hundred seven".