1978650132 has 48 divisors (see below), whose sum is σ = 4661997312. Its totient is φ = 653132160.

The previous prime is 1978650083. The next prime is 1978650143. The reversal of 1978650132 is 2310568791.

It is a super-4 number, since 4×1978650132⁴ (a number of 38 digits) contains 4444 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 560838 + ... + 564354.

It is an arithmetic number, because the mean of its divisors is an integer number (97124944).

Almost surely, 2^1978650132 is an apocalyptic number.

1978650132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1978650132 is an abundant number, since it is smaller than the sum of its proper divisors (2683347180).

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

1978650132 is a wasteful number, since it uses less digits than its factorization.

1978650132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3968 (or 3966 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 1978650132 is about 44482.0203228226. The cubic root of 1978650132 is about 1255.4218106676.

The spelling of 1978650132 in words is "one billion, nine hundred seventy-eight million, six hundred fifty thousand, one hundred thirty-two".