1977279328 has 12 divisors (see below), whose sum is σ = 3892768740. Its totient is φ = 988639648.

The previous prime is 1977279307. The next prime is 1977279349. The reversal of 1977279328 is 8239727791.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1977279307) and next prime (1977279349).

It is a super-2 number, since 2×1977279328² = 7819267081872263168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30894958 + ... + 30895021.

It is an arithmetic number, because the mean of its divisors is an integer number (324397395).

Almost surely, 2^1977279328 is an apocalyptic number.

It is an amenable number.

1977279328 is a deficient number, since it is larger than the sum of its proper divisors (1915489412).

1977279328 is an equidigital number, since it uses as much as digits as its factorization.

1977279328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61789989 (or 61789981 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 55.

The square root of 1977279328 is about 44466.6091353951. The cubic root of 1977279328 is about 1255.1318259645.

The spelling of 1977279328 in words is "one billion, nine hundred seventy-seven million, two hundred seventy-nine thousand, three hundred twenty-eight".