1978264 has 16 divisors (see below), whose sum is σ = 3837600. Its totient is φ = 954912.

The previous prime is 1978219. The next prime is 1978267. The reversal of 1978264 is 4628791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1978267) 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, 4032 + ... + 4495.

It is an arithmetic number, because the mean of its divisors is an integer number (239850).

2^1978264 is an apocalyptic number.

It is an amenable number.

1978264 is a deficient number, since it is larger than the sum of its proper divisors (1859336).

1978264 is a wasteful number, since it uses less digits than its factorization.

1978264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8562 (or 8558 counting only the distinct ones).

The product of its digits is 24192, while the sum is 37.

The square root of 1978264 is about 1406.5077319375. The cubic root of 1978264 is about 125.5340140499.

The spelling of 1978264 in words is "one million, nine hundred seventy-eight thousand, two hundred sixty-four".