215629998 has 32 divisors (see below), whose sum is σ = 441876480. Its totient is φ = 70126560.

The previous prime is 215629979. The next prime is 215630003. The reversal of 215629998 is 899926512.

It is a self number, because there is not a number n which added to its sum of digits gives 215629998.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44163 + ... + 48801.

It is an arithmetic number, because the mean of its divisors is an integer number (13808640).

Almost surely, 2^215629998 is an apocalyptic number.

215629998 is an abundant number, since it is smaller than the sum of its proper divisors (226246482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215629998 is a wasteful number, since it uses less digits than its factorization.

215629998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4832.

The product of its digits is 699840, while the sum is 51.

The square root of 215629998 is about 14684.3453378079. The cubic root of 215629998 is about 599.6572097509.

The spelling of 215629998 in words is "two hundred fifteen million, six hundred twenty-nine thousand, nine hundred ninety-eight".