1197779490 has 48 divisors (see below), whose sum is σ = 3180498048. Its totient is φ = 312610848.

The previous prime is 1197779483. The next prime is 1197779509. The reversal of 1197779490 is 949777911.

1197779490 is a `hidden beast` number, since 1 + 19 + 77 + 79 + 490 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137352 + ... + 145811.

It is an arithmetic number, because the mean of its divisors is an integer number (66260376).

Almost surely, 2^1197779490 is an apocalyptic number.

1197779490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1197779490 is an abundant number, since it is smaller than the sum of its proper divisors (1982718558).

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

1197779490 is a wasteful number, since it uses less digits than its factorization.

1197779490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283223 (or 283220 counting only the distinct ones).

The product of its (nonzero) digits is 1000188, while the sum is 54.

The square root of 1197779490 is about 34608.9510098183. The cubic root of 1197779490 is about 1062.0027078144.

The spelling of 1197779490 in words is "one billion, one hundred ninety-seven million, seven hundred seventy-nine thousand, four hundred ninety".