211040978 has 8 divisors (see below), whose sum is σ = 318168972. Its totient is φ = 104984656.

The previous prime is 211040971. The next prime is 211040987. The reversal of 211040978 is 879040112.

It can be written as a sum of positive squares in 2 ways, for example, as 210163009 + 877969 = 14497^2 + 937^2 .

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

It is not an unprimeable number, because it can be changed into a prime (211040971) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 267425 + ... + 268212.

Almost surely, 2^211040978 is an apocalyptic number.

211040978 is a deficient number, since it is larger than the sum of its proper divisors (107127994).

211040978 is a wasteful number, since it uses less digits than its factorization.

211040978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535836.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 211040978 is about 14527.2494987868. The cubic root of 211040978 is about 595.3727184782.

The spelling of 211040978 in words is "two hundred eleven million, forty thousand, nine hundred seventy-eight".