1954389540 has 24 divisors (see below), whose sum is σ = 5472290880. Its totient is φ = 521170528.

The previous prime is 1954389539. The next prime is 1954389551. The reversal of 1954389540 is 459834591.

It is a super-2 number, since 2×1954389540² = 7639276948122823200, 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 1954389540.

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, 16286520 + ... + 16286639.

It is an arithmetic number, because the mean of its divisors is an integer number (228012120).

Almost surely, 2^1954389540 is an apocalyptic number.

1954389540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1954389540 is an abundant number, since it is smaller than the sum of its proper divisors (3517901340).

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

1954389540 is a wasteful number, since it uses less digits than its factorization.

1954389540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32573171 (or 32573169 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 48.

The square root of 1954389540 is about 44208.4781461656. The cubic root of 1954389540 is about 1250.2697103342.

The spelling of 1954389540 in words is "one billion, nine hundred fifty-four million, three hundred eighty-nine thousand, five hundred forty".