1966392940 has 24 divisors (see below), whose sum is σ = 4130304192. Its totient is φ = 786389760.

The previous prime is 1966392931. The next prime is 1966392949. The reversal of 1966392940 is 492936691.

It is an interprime number because it is at equal distance from previous prime (1966392931) and next prime (1966392949).

It is not an unprimeable number, because it can be changed into a prime (1966392949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135517 + ... + 149323.

It is an arithmetic number, because the mean of its divisors is an integer number (172096008).

Almost surely, 2^1966392940 is an apocalyptic number.

1966392940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1966392940 is an abundant number, since it is smaller than the sum of its proper divisors (2163911252).

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

1966392940 is a wasteful number, since it uses less digits than its factorization.

1966392940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20937 (or 20935 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 49.

The square root of 1966392940 is about 44344.0293613469. The cubic root of 1966392940 is about 1252.8241085901.

The spelling of 1966392940 in words is "one billion, nine hundred sixty-six million, three hundred ninety-two thousand, nine hundred forty".