1978670262 has 16 divisors (see below), whose sum is σ = 3966159600. Its totient is φ = 658086912.

The previous prime is 1978670191. The next prime is 1978670269. The reversal of 1978670262 is 2620768791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1978670269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364543 + ... + 369930.

It is an arithmetic number, because the mean of its divisors is an integer number (247884975).

Almost surely, 2^1978670262 is an apocalyptic number.

1978670262 is an abundant number, since it is smaller than the sum of its proper divisors (1987489338).

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

1978670262 is a wasteful number, since it uses less digits than its factorization.

1978670262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734927.

The product of its (nonzero) digits is 508032, while the sum is 48.

The square root of 1978670262 is about 44482.2465934444. The cubic root of 1978670262 is about 1255.4260680407.

The spelling of 1978670262 in words is "one billion, nine hundred seventy-eight million, six hundred seventy thousand, two hundred sixty-two".