1948620890 has 16 divisors (see below), whose sum is σ = 3511625832. Its totient is φ = 778535424.

The previous prime is 1948620871. The next prime is 1948620911. The reversal of 1948620890 is 980268491.

It can be written as a sum of positive squares in 4 ways, for example, as 1822350721 + 126270169 = 42689^2 + 11237^2 .

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, 105119 + ... + 122258.

Almost surely, 2^1948620890 is an apocalyptic number.

1948620890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1948620890 is a deficient number, since it is larger than the sum of its proper divisors (1563004942).

1948620890 is a wasteful number, since it uses less digits than its factorization.

1948620890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228241.

The product of its (nonzero) digits is 248832, while the sum is 47.

The square root of 1948620890 is about 44143.1862239236. The cubic root of 1948620890 is about 1249.0383836249.

The spelling of 1948620890 in words is "one billion, nine hundred forty-eight million, six hundred twenty thousand, eight hundred ninety".