978072231 has 32 divisors (see below), whose sum is σ = 1354921216. Its totient is φ = 627264000.

The previous prime is 978072223. The next prime is 978072233. The reversal of 978072231 is 132270879.

978072231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 978072231 - 2³ = 978072223 is a prime.

It is a super-2 number, since 2×978072231² = 1913250578106634722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 978072231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978072233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2954736 + ... + 2955066.

It is an arithmetic number, because the mean of its divisors is an integer number (42341288).

Almost surely, 2^978072231 is an apocalyptic number.

978072231 is a deficient number, since it is larger than the sum of its proper divisors (376848985).

978072231 is a wasteful number, since it uses less digits than its factorization.

978072231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 978072231 is about 31274.1463672472. The cubic root of 978072231 is about 992.6366579375.

The spelling of 978072231 in words is "nine hundred seventy-eight million, seventy-two thousand, two hundred thirty-one".