215428426 has 8 divisors (see below), whose sum is σ = 323222400. Its totient is φ = 107687628.

The previous prime is 215428417. The next prime is 215428427. The reversal of 215428426 is 624824512.

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

It is a junction number, because it is equal to n+sod(n) for n = 215428391 and 215428400.

It is not an unprimeable number, because it can be changed into a prime (215428427) 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, 826 + ... + 20773.

It is an arithmetic number, because the mean of its divisors is an integer number (40402800).

Almost surely, 2^215428426 is an apocalyptic number.

215428426 is a deficient number, since it is larger than the sum of its proper divisors (107793974).

215428426 is a wasteful number, since it uses less digits than its factorization.

215428426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26588.

The product of its digits is 30720, while the sum is 34.

The square root of 215428426 is about 14677.4802333371. The cubic root of 215428426 is about 599.4702973109.

The spelling of 215428426 in words is "two hundred fifteen million, four hundred twenty-eight thousand, four hundred twenty-six".