978730215 has 8 divisors (see below), whose sum is σ = 1565968368. Its totient is φ = 521989440.

The previous prime is 978730189. The next prime is 978730283. The reversal of 978730215 is 512037879.

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

It is not a de Polignac number, because 978730215 - 2⁵ = 978730183 is a prime.

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, 32624326 + ... + 32624355.

It is an arithmetic number, because the mean of its divisors is an integer number (195746046).

Almost surely, 2^978730215 is an apocalyptic number.

978730215 is a deficient number, since it is larger than the sum of its proper divisors (587238153).

978730215 is a wasteful number, since it uses less digits than its factorization.

978730215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65248689.

The product of its (nonzero) digits is 105840, while the sum is 42.

The square root of 978730215 is about 31284.6642142760. The cubic root of 978730215 is about 992.8592020433.

The spelling of 978730215 in words is "nine hundred seventy-eight million, seven hundred thirty thousand, two hundred fifteen".