1978079202 has 54 divisors (see below), whose sum is σ = 4715828481. Its totient is φ = 598788960.

The previous prime is 1978079179. The next prime is 1978079209. The reversal of 1978079202 is 2029708791.

It can be written as a sum of positive squares in 2 ways, for example, as 1964173761 + 13905441 = 44319^2 + 3729^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=31449.

It is not an unprimeable number, because it can be changed into a prime (1978079209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2075158 + ... + 2076110.

Almost surely, 2^1978079202 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1978079202

1978079202 is an abundant number, since it is smaller than the sum of its proper divisors (2737749279).

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

1978079202 is an equidigital number, since it uses as much as digits as its factorization.

1978079202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1936 (or 969 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 1978079202 is about 44475.6023230715. The cubic root of 1978079202 is about 1255.3010504057.

Multiplying 1978079202 by its product of nonzero digits (127008), we get a square (251231883287616 = 15850296²).

The spelling of 1978079202 in words is "one billion, nine hundred seventy-eight million, seventy-nine thousand, two hundred two".