1951895540 has 48 divisors (see below), whose sum is σ = 4693390464. Its totient is φ = 667958400.

The previous prime is 1951895467. The next prime is 1951895549. The reversal of 1951895540 is 455981591.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1951895549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62855 + ... + 88625.

It is an arithmetic number, because the mean of its divisors is an integer number (97778968).

Almost surely, 2^1951895540 is an apocalyptic number.

1951895540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1951895540 is an abundant number, since it is smaller than the sum of its proper divisors (2741494924).

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

1951895540 is a wasteful number, since it uses less digits than its factorization.

1951895540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26328 (or 26326 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 47.

The square root of 1951895540 is about 44180.2618824289. The cubic root of 1951895540 is about 1249.7376601461.

The spelling of 1951895540 in words is "one billion, nine hundred fifty-one million, eight hundred ninety-five thousand, five hundred forty".