405840147 has 8 divisors (see below), whose sum is σ = 541367760. Its totient is φ = 270436320.

The previous prime is 405840139. The next prime is 405840157. The reversal of 405840147 is 741048504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 405840147 - 2³ = 405840139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (405840157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23004 + ... + 36617.

It is an arithmetic number, because the mean of its divisors is an integer number (67670970).

Almost surely, 2^405840147 is an apocalyptic number.

405840147 is a deficient number, since it is larger than the sum of its proper divisors (135527613).

405840147 is a wasteful number, since it uses less digits than its factorization.

405840147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61893.

The product of its (nonzero) digits is 17920, while the sum is 33.

The square root of 405840147 is about 20145.4746034935. The cubic root of 405840147 is about 740.3748691123.

The spelling of 405840147 in words is "four hundred five million, eight hundred forty thousand, one hundred forty-seven".