1974656988 has 24 divisors (see below), whose sum is σ = 5119481360. Its totient is φ = 658218960.

The previous prime is 1974656977. The next prime is 1974656989. The reversal of 1974656988 is 8896564791.

1974656988 is a `hidden beast` number, since 1 + 97 + 465 + 6 + 9 + 88 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1974656989) 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, 9141823 + ... + 9142038.

Almost surely, 2^1974656988 is an apocalyptic number.

1974656988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1974656988 is an abundant number, since it is smaller than the sum of its proper divisors (3144824372).

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

1974656988 is a wasteful number, since it uses less digits than its factorization.

1974656988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18283874 (or 18283866 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 63.

The square root of 1974656988 is about 44437.1127324897. The cubic root of 1974656988 is about 1254.5767132785.

The spelling of 1974656988 in words is "one billion, nine hundred seventy-four million, six hundred fifty-six thousand, nine hundred eighty-eight".