405299864 has 16 divisors (see below), whose sum is σ = 760324320. Its totient is φ = 202546720.

The previous prime is 405299861. The next prime is 405299891. The reversal of 405299864 is 468992504.

It is a super-3 number, since 3×405299864³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405299861) 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, 5297 + ... + 28959.

It is an arithmetic number, because the mean of its divisors is an integer number (47520270).

Almost surely, 2^405299864 is an apocalyptic number.

It is an amenable number.

405299864 is a deficient number, since it is larger than the sum of its proper divisors (355024456).

405299864 is a wasteful number, since it uses less digits than its factorization.

405299864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25810 (or 25806 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 47.

The square root of 405299864 is about 20132.0605999485. The cubic root of 405299864 is about 740.0461768117.

The spelling of 405299864 in words is "four hundred five million, two hundred ninety-nine thousand, eight hundred sixty-four".