10998978 has 8 divisors (see below), whose sum is σ = 21997968. Its totient is φ = 3666324.

The previous prime is 10998973. The next prime is 10998979. The reversal of 10998978 is 87989901.

10998978 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

10998978 is an admirable number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 10998978.

It is not an unprimeable number, because it can be changed into a prime (10998973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 916576 + ... + 916587.

It is an arithmetic number, because the mean of its divisors is an integer number (2749746).

Almost surely, 2^10998978 is an apocalyptic number.

10998978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

10998978 is a wasteful number, since it uses less digits than its factorization.

10998978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1833168.

The product of its (nonzero) digits is 326592, while the sum is 51.

The square root of 10998978 is about 3316.4707144795. The cubic root of 10998978 is about 222.3911212447.

The spelling of 10998978 in words is "ten million, nine hundred ninety-eight thousand, nine hundred seventy-eight".