402213407 has 4 divisors (see below), whose sum is σ = 402393096. Its totient is φ = 402033720.

The previous prime is 402213359. The next prime is 402213419. The reversal of 402213407 is 704312204.

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 402213407 - 2²⁸ = 133777951 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 (402213457) 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, 86444 + ... + 90977.

It is an arithmetic number, because the mean of its divisors is an integer number (100598274).

Almost surely, 2^402213407 is an apocalyptic number.

402213407 is a deficient number, since it is larger than the sum of its proper divisors (179689).

402213407 is a wasteful number, since it uses less digits than its factorization.

402213407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179688.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 402213407 is about 20055.2588365246. The cubic root of 402213407 is about 738.1628441602.

The spelling of 402213407 in words is "four hundred two million, two hundred thirteen thousand, four hundred seven".