971878258 has 16 divisors (see below), whose sum is σ = 1581947136. Its totient is φ = 445133520.

The previous prime is 971878249. The next prime is 971878261. The reversal of 971878258 is 852878179.

It is a super-2 number, since 2×971878258² = 1889094696746229128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 971878199 and 971878208.

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, 139266 + ... + 146077.

It is an arithmetic number, because the mean of its divisors is an integer number (98871696).

Almost surely, 2^971878258 is an apocalyptic number.

971878258 is a deficient number, since it is larger than the sum of its proper divisors (610068878).

971878258 is a wasteful number, since it uses less digits than its factorization.

971878258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285489.

The product of its digits is 2257920, while the sum is 55.

The square root of 971878258 is about 31174.9620368654. The cubic root of 971878258 is about 990.5368166426.

The spelling of 971878258 in words is "nine hundred seventy-one million, eight hundred seventy-eight thousand, two hundred fifty-eight".