1197978530 has 32 divisors (see below), whose sum is σ = 2466716544. Its totient is φ = 410351616.

The previous prime is 1197978511. The next prime is 1197978541. The reversal of 1197978530 is 358797911.

It is a super-3 number, since 3×1197978530³ (a number of 28 digits) contains 333 as substring.

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 in 15 ways as a sum of consecutive naturals, for example, 73289 + ... + 88131.

It is an arithmetic number, because the mean of its divisors is an integer number (77084892).

Almost surely, 2^1197978530 is an apocalyptic number.

1197978530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1197978530 is an abundant number, since it is smaller than the sum of its proper divisors (1268738014).

1197978530 is a wasteful number, since it uses less digits than its factorization.

1197978530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16010.

The product of its (nonzero) digits is 476280, while the sum is 50.

The square root of 1197978530 is about 34611.8264470397. The cubic root of 1197978530 is about 1062.0615303587.

It can be divided in two parts, 11979 and 78530, that added together give a palindrome (90509).

The spelling of 1197978530 in words is "one billion, one hundred ninety-seven million, nine hundred seventy-eight thousand, five hundred thirty".