1940609238 has 64 divisors (see below), whose sum is σ = 4101027840. Its totient is φ = 611366400.

The previous prime is 1940609219. The next prime is 1940609249. The reversal of 1940609238 is 8329060491.

It is a super-2 number, since 2×1940609238² = 7531928429221881288, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1940609238.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1985806 + ... + 1986782.

It is an arithmetic number, because the mean of its divisors is an integer number (64078560).

Almost surely, 2^1940609238 is an apocalyptic number.

1940609238 is an abundant number, since it is smaller than the sum of its proper divisors (2160418602).

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

1940609238 is a wasteful number, since it uses less digits than its factorization.

1940609238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 1940609238 is about 44052.3465663295. The cubic root of 1940609238 is about 1247.3242471376.

The spelling of 1940609238 in words is "one billion, nine hundred forty million, six hundred nine thousand, two hundred thirty-eight".