1978752970 has 16 divisors (see below), whose sum is σ = 3658019688. Its totient is φ = 770109120.

The previous prime is 1978752959. The next prime is 1978752989. The reversal of 1978752970 is 792578791.

It can be written as a sum of positive squares in 4 ways, for example, as 1955143089 + 23609881 = 44217^2 + 4859^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2673621 + ... + 2674360.

Almost surely, 2^1978752970 is an apocalyptic number.

1978752970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1978752970 is a deficient number, since it is larger than the sum of its proper divisors (1679266718).

1978752970 is a wasteful number, since it uses less digits than its factorization.

1978752970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5348025.

The product of its (nonzero) digits is 2222640, while the sum is 55.

The square root of 1978752970 is about 44483.1762579967. The cubic root of 1978752970 is about 1255.4435599786.

The spelling of 1978752970 in words is "one billion, nine hundred seventy-eight million, seven hundred fifty-two thousand, nine hundred seventy".