1978000630 has 16 divisors (see below), whose sum is σ = 3570667920. Its totient is φ = 788918752.

The previous prime is 1978000613. The next prime is 1978000631. The reversal of 1978000630 is 360008791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1978000631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281545 + ... + 288484.

It is an arithmetic number, because the mean of its divisors is an integer number (223166745).

Almost surely, 2^1978000630 is an apocalyptic number.

1978000630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1978000630 is a deficient number, since it is larger than the sum of its proper divisors (1592667290).

1978000630 is a wasteful number, since it uses less digits than its factorization.

1978000630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570383.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 1978000630 is about 44474.7189985502. The cubic root of 1978000630 is about 1255.2844294298.

The spelling of 1978000630 in words is "one billion, nine hundred seventy-eight million, six hundred thirty", and thus it is an aban number.