1940402534 has 8 divisors (see below), whose sum is σ = 3326404368. Its totient is φ = 831601080.

The previous prime is 1940402533. The next prime is 1940402549. The reversal of 1940402534 is 4352040491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1940402534.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1940402533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69300077 + ... + 69300104.

It is an arithmetic number, because the mean of its divisors is an integer number (415800546).

Almost surely, 2^1940402534 is an apocalyptic number.

1940402534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1940402534 is a deficient number, since it is larger than the sum of its proper divisors (1386001834).

1940402534 is a wasteful number, since it uses less digits than its factorization.

1940402534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138600190.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 1940402534 is about 44050.0003859251. Note that the first 3 decimals coincide. The cubic root of 1940402534 is about 1247.2799593162.

The spelling of 1940402534 in words is "one billion, nine hundred forty million, four hundred two thousand, five hundred thirty-four".