402666415 has 16 divisors (see below), whose sum is σ = 488638656. Its totient is φ = 318528000.

The previous prime is 402666401. The next prime is 402666457. The reversal of 402666415 is 514666204.

It is not a de Polignac number, because 402666415 - 2⁷ = 402666287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180849 + ... + 183061.

It is an arithmetic number, because the mean of its divisors is an integer number (30539916).

Almost surely, 2^402666415 is an apocalyptic number.

402666415 is a deficient number, since it is larger than the sum of its proper divisors (85972241).

402666415 is a wasteful number, since it uses less digits than its factorization.

402666415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2610.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 402666415 is about 20066.5496535902. The cubic root of 402666415 is about 738.4398680860.

The spelling of 402666415 in words is "four hundred two million, six hundred sixty-six thousand, four hundred fifteen".