2192778 has 32 divisors (see below), whose sum is σ = 5569920. Its totient is φ = 626400.

The previous prime is 2192761. The next prime is 2192783. The reversal of 2192778 is 8772912.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2523 + ... + 3278.

It is an arithmetic number, because the mean of its divisors is an integer number (174060).

2^2192778 is an apocalyptic number.

2192778 is an abundant number, since it is smaller than the sum of its proper divisors (3377142).

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

2192778 is a wasteful number, since it uses less digits than its factorization.

2192778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5819 (or 5813 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 2192778 is about 1480.8031604504. The cubic root of 2192778 is about 129.9166724383.

The spelling of 2192778 in words is "two million, one hundred ninety-two thousand, seven hundred seventy-eight".