218700394 has 8 divisors (see below), whose sum is σ = 357873408. Its totient is φ = 99409260.

The previous prime is 218700379. The next prime is 218700409. The reversal of 218700394 is 493007812.

It is an interprime number because it is at equal distance from previous prime (218700379) and next prime (218700409).

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4970442 + ... + 4970485.

It is an arithmetic number, because the mean of its divisors is an integer number (44734176).

Almost surely, 2^218700394 is an apocalyptic number.

218700394 is a deficient number, since it is larger than the sum of its proper divisors (139173014).

218700394 is a wasteful number, since it uses less digits than its factorization.

218700394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9940940.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 218700394 is about 14788.5223737870. The cubic root of 218700394 is about 602.4900168797.

The spelling of 218700394 in words is "two hundred eighteen million, seven hundred thousand, three hundred ninety-four".