402216238 has 16 divisors (see below), whose sum is σ = 621815040. Its totient is φ = 195012216.

The previous prime is 402216197. The next prime is 402216247. The reversal of 402216238 is 832612204.

It is a super-2 number, since 2×402216238² = 323555804221745288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4870 + ... + 28777.

It is an arithmetic number, because the mean of its divisors is an integer number (38863440).

Almost surely, 2^402216238 is an apocalyptic number.

402216238 is a deficient number, since it is larger than the sum of its proper divisors (219598802).

402216238 is a wasteful number, since it uses less digits than its factorization.

402216238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33831.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 402216238 is about 20055.3294163920. The cubic root of 402216238 is about 738.1645760220.

The spelling of 402216238 in words is "four hundred two million, two hundred sixteen thousand, two hundred thirty-eight".