1949940478 has 16 divisors (see below), whose sum is σ = 3012609600. Its totient is φ = 945889056.

The previous prime is 1949940439. The next prime is 1949940481. The reversal of 1949940478 is 8740499491.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11926 + ... + 63577.

It is an arithmetic number, because the mean of its divisors is an integer number (188288100).

Almost surely, 2^1949940478 is an apocalyptic number.

1949940478 is a deficient number, since it is larger than the sum of its proper divisors (1062669122).

1949940478 is a wasteful number, since it uses less digits than its factorization.

1949940478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75891.

The product of its (nonzero) digits is 2612736, while the sum is 55.

The square root of 1949940478 is about 44158.1303725599. The cubic root of 1949940478 is about 1249.3202657427.

The spelling of 1949940478 in words is "one billion, nine hundred forty-nine million, nine hundred forty thousand, four hundred seventy-eight".