2231978 has 16 divisors (see below), whose sum is σ = 3858624. Its totient is φ = 948480.

The previous prime is 2231941. The next prime is 2232017. The reversal of 2231978 is 8791322.

It is a super-3 number, since 3×2231978³ = 33357307112570560056, which contains 333 as substring.

It is a d-powerful number, because it can be written as 2¹³ + 2¹³ + 3¹⁰ + 1 + 9⁵ + 7³ + 8⁷ .

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, 1226 + ... + 2442.

It is an arithmetic number, because the mean of its divisors is an integer number (241164).

2^2231978 is an apocalyptic number.

2231978 is a deficient number, since it is larger than the sum of its proper divisors (1626646).

2231978 is a wasteful number, since it uses less digits than its factorization.

2231978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357.

The product of its digits is 6048, while the sum is 32.

The square root of 2231978 is about 1493.9805888967. The cubic root of 2231978 is about 130.6862721635.

The spelling of 2231978 in words is "two million, two hundred thirty-one thousand, nine hundred seventy-eight".