402666215 has 8 divisors (see below), whose sum is σ = 552228000. Its totient is φ = 276113952.

The previous prime is 402666211. The next prime is 402666241. The reversal of 402666215 is 512666204.

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

It is a cyclic number.

It is not a de Polignac number, because 402666215 - 2² = 402666211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402666211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5752340 + ... + 5752409.

It is an arithmetic number, because the mean of its divisors is an integer number (69028500).

Almost surely, 2^402666215 is an apocalyptic number.

402666215 is a deficient number, since it is larger than the sum of its proper divisors (149561785).

402666215 is a wasteful number, since it uses less digits than its factorization.

402666215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11504761.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 402666215 is about 20066.5446701718. The cubic root of 402666215 is about 738.4397458276.

The spelling of 402666215 in words is "four hundred two million, six hundred sixty-six thousand, two hundred fifteen".