1959489940 has 12 divisors (see below), whose sum is σ = 4114928916. Its totient is φ = 783795968.

The previous prime is 1959489937. The next prime is 1959490003. The reversal of 1959489940 is 499849591.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1533975556 + 425514384 = 39166^2 + 20628^2 .

It is a super-2 number, since 2×1959489940² = 7679201649922407200, which contains 22 as substring.

It is a congruent number.

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, 48987229 + ... + 48987268.

It is an arithmetic number, because the mean of its divisors is an integer number (342910743).

Almost surely, 2^1959489940 is an apocalyptic number.

1959489940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1959489940 is an abundant number, since it is smaller than the sum of its proper divisors (2155438976).

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

1959489940 is a wasteful number, since it uses less digits than its factorization.

1959489940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97974506 (or 97974504 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 58.

The square root of 1959489940 is about 44266.1263270235. The cubic root of 1959489940 is about 1251.3563815177.

The spelling of 1959489940 in words is "one billion, nine hundred fifty-nine million, four hundred eighty-nine thousand, nine hundred forty".