1984626690 has 16 divisors (see below), whose sum is σ = 4763104128. Its totient is φ = 529233776.

The previous prime is 1984626671. The next prime is 1984626739. The reversal of 1984626690 is 966264891.

It is a super-2 number, since 2×1984626690² = 7877486197320712200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33077082 + ... + 33077141.

It is an arithmetic number, because the mean of its divisors is an integer number (297694008).

Almost surely, 2^1984626690 is an apocalyptic number.

1984626690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1984626690 is an abundant number, since it is smaller than the sum of its proper divisors (2778477438).

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

1984626690 is a wasteful number, since it uses less digits than its factorization.

1984626690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66154233.

The product of its (nonzero) digits is 1119744, while the sum is 51.

The square root of 1984626690 is about 44549.1491501241. The cubic root of 1984626690 is about 1256.6845502438.

The spelling of 1984626690 in words is "one billion, nine hundred eighty-four million, six hundred twenty-six thousand, six hundred ninety".