1979828145 has 24 divisors (see below), whose sum is σ = 3511512576. Its totient is φ = 1031351328.

The previous prime is 1979828129. The next prime is 1979828183. The reversal of 1979828145 is 5418289791.

It is a happy number.

It is not a de Polignac number, because 1979828145 - 2⁴ = 1979828129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1979828091 and 1979828100.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 509649 + ... + 513518.

It is an arithmetic number, because the mean of its divisors is an integer number (146313024).

Almost surely, 2^1979828145 is an apocalyptic number.

1979828145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1979828145 is a deficient number, since it is larger than the sum of its proper divisors (1531684431).

1979828145 is a wasteful number, since it uses less digits than its factorization.

1979828145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023221 (or 1023218 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 54.

The square root of 1979828145 is about 44495.2598037139. The cubic root of 1979828145 is about 1255.6709046993.

The spelling of 1979828145 in words is "one billion, nine hundred seventy-nine million, eight hundred twenty-eight thousand, one hundred forty-five".