2136978 has 24 divisors (see below), whose sum is σ = 4659408. Its totient is φ = 707832.

The previous prime is 2136977. The next prime is 2136983. The reversal of 2136978 is 8796312.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2136973) 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, 3825 + ... + 4347.

It is an arithmetic number, because the mean of its divisors is an integer number (194142).

2^2136978 is an apocalyptic number.

2136978 is an abundant number, since it is smaller than the sum of its proper divisors (2522430).

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

2136978 is a wasteful number, since it uses less digits than its factorization.

2136978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758 (or 755 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 2136978 is about 1461.8406205876. The cubic root of 2136978 is about 128.8051863838.

The spelling of 2136978 in words is "two million, one hundred thirty-six thousand, nine hundred seventy-eight".