1909094540 has 48 divisors (see below), whose sum is σ = 4277975520. Its totient is φ = 713525760.

The previous prime is 1909094501. The next prime is 1909094549. The reversal of 1909094540 is 454909091.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1909094549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6671 + ... + 62150.

It is an arithmetic number, because the mean of its divisors is an integer number (89124490).

Almost surely, 2^1909094540 is an apocalyptic number.

1909094540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1909094540 is an abundant number, since it is smaller than the sum of its proper divisors (2368880980).

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

1909094540 is a wasteful number, since it uses less digits than its factorization.

1909094540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68922 (or 68920 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 1909094540 is about 43693.1864253455. The cubic root of 1909094540 is about 1240.5353524294.

The spelling of 1909094540 in words is "one billion, nine hundred nine million, ninety-four thousand, five hundred forty".