971081440 has 48 divisors (see below), whose sum is σ = 2621922912. Its totient is φ = 332941824.

The previous prime is 971081407. The next prime is 971081473. The reversal of 971081440 is 44180179.

It is an interprime number because it is at equal distance from previous prime (971081407) and next prime (971081473).

It is a super-2 number, since 2×971081440² = 1885998326224947200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 971081396 and 971081405.

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, 432399 + ... + 434638.

It is an arithmetic number, because the mean of its divisors is an integer number (54623394).

Almost surely, 2^971081440 is an apocalyptic number.

It is an amenable number.

971081440 is an abundant number, since it is smaller than the sum of its proper divisors (1650841472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

971081440 is a wasteful number, since it uses less digits than its factorization.

971081440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867059 (or 867051 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 971081440 is about 31162.1796413537. The cubic root of 971081440 is about 990.2660374032.

The spelling of 971081440 in words is "nine hundred seventy-one million, eighty-one thousand, four hundred forty".