1940249906 has 16 divisors (see below), whose sum is σ = 3326806080. Its totient is φ = 831369840.

The previous prime is 1940249897. The next prime is 1940249957. The reversal of 1940249906 is 6099420491.

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, 81605 + ... + 102663.

It is an arithmetic number, because the mean of its divisors is an integer number (207925380).

Almost surely, 2^1940249906 is an apocalyptic number.

1940249906 is a deficient number, since it is larger than the sum of its proper divisors (1386556174).

1940249906 is a wasteful number, since it uses less digits than its factorization.

1940249906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27649.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 1940249906 is about 44048.2679114628. The cubic root of 1940249906 is about 1247.2472556488.

The spelling of 1940249906 in words is "one billion, nine hundred forty million, two hundred forty-nine thousand, nine hundred six".