1790779890 has 16 divisors (see below), whose sum is σ = 4297871808. Its totient is φ = 477541296.

The previous prime is 1790779889. The next prime is 1790779933. The reversal of 1790779890 is 989770971.

It is a super-2 number, since 2×1790779890² = 6413785228856824200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1790779890.

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 7 ways as a sum of consecutive naturals, for example, 29846302 + ... + 29846361.

It is an arithmetic number, because the mean of its divisors is an integer number (268616988).

Almost surely, 2^1790779890 is an apocalyptic number.

1790779890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1790779890 is an abundant number, since it is smaller than the sum of its proper divisors (2507091918).

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

1790779890 is a wasteful number, since it uses less digits than its factorization.

1790779890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59692673.

The product of its (nonzero) digits is 2000376, while the sum is 57.

The square root of 1790779890 is about 42317.6073283923. The cubic root of 1790779890 is about 1214.3598585605.

The spelling of 1790779890 in words is "one billion, seven hundred ninety million, seven hundred seventy-nine thousand, eight hundred ninety".