10978891 has 12 divisors (see below), whose sum is σ = 13933080. Its totient is φ = 8554560.

The previous prime is 10978883. The next prime is 10978901. The reversal of 10978891 is 19887901.

10978891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10978891 - 2³ = 10978883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10978811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9646 + ... + 10723.

It is an arithmetic number, because the mean of its divisors is an integer number (1161090).

Almost surely, 2^10978891 is an apocalyptic number.

10978891 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

10978891 is a deficient number, since it is larger than the sum of its proper divisors (2954189).

10978891 is a wasteful number, since it uses less digits than its factorization.

10978891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20394 (or 20387 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 43.

The square root of 10978891 is about 3313.4409606933. The cubic root of 10978891 is about 222.2556573673.

The spelling of 10978891 in words is "ten million, nine hundred seventy-eight thousand, eight hundred ninety-one".