1011978 has 48 divisors (see below), whose sum is σ = 2527200. Its totient is φ = 289440.

The previous prime is 1011973. The next prime is 1011979. The reversal of 1011978 is 8791101.

1011978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1011973) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3628 + ... + 3896.

It is an arithmetic number, because the mean of its divisors is an integer number (52650).

2^1011978 is an apocalyptic number.

1011978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1011978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1263600).

1011978 is an abundant number, since it is smaller than the sum of its proper divisors (1515222).

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

1011978 is a wasteful number, since it uses less digits than its factorization.

1011978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 27.

The square root of 1011978 is about 1005.9711725492. The cubic root of 1011978 is about 100.3976830521.

The spelling of 1011978 in words is "one million, eleven thousand, nine hundred seventy-eight".