1959491840 has 36 divisors (see below), whose sum is σ = 4693598364. Its totient is φ = 783796224.

The previous prime is 1959491827. The next prime is 1959491861. The reversal of 1959491840 is 481949591.

It can be written as a sum of positive squares in 2 ways, for example, as 328624384 + 1630867456 = 18128^2 + 40384^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 764147 + ... + 766706.

Almost surely, 2^1959491840 is an apocalyptic number.

1959491840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1959491840 is an abundant number, since it is smaller than the sum of its proper divisors (2734106524).

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

1959491840 is an equidigital number, since it uses as much as digits as its factorization.

1959491840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1530874 (or 1530860 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 50.

The square root of 1959491840 is about 44266.1477881236. The cubic root of 1959491840 is about 1251.3567859726.

The spelling of 1959491840 in words is "one billion, nine hundred fifty-nine million, four hundred ninety-one thousand, eight hundred forty".