10891970 has 8 divisors (see below), whose sum is σ = 19605564. Its totient is φ = 4356784.

The previous prime is 10891963. The next prime is 10891987. The reversal of 10891970 is 7919801.

It can be written as a sum of positive squares in 2 ways, for example, as 9740641 + 1151329 = 3121^2 + 1073^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 10891970.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 544589 + ... + 544608.

Almost surely, 2^10891970 is an apocalyptic number.

10891970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10891970 is a deficient number, since it is larger than the sum of its proper divisors (8713594).

10891970 is a wasteful number, since it uses less digits than its factorization.

10891970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089204.

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 10891970 is about 3300.2984713507. The cubic root of 10891970 is about 221.6675623861.

The spelling of 10891970 in words is "ten million, eight hundred ninety-one thousand, nine hundred seventy".