1340021838 has 32 divisors (see below), whose sum is σ = 2840755104. Its totient is φ = 419945472.

The previous prime is 1340021807. The next prime is 1340021849. The reversal of 1340021838 is 8381200431.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95106 + ... + 108282.

It is an arithmetic number, because the mean of its divisors is an integer number (88773597).

Almost surely, 2^1340021838 is an apocalyptic number.

1340021838 is an abundant number, since it is smaller than the sum of its proper divisors (1500733266).

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

1340021838 is a wasteful number, since it uses less digits than its factorization.

1340021838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14196.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 1340021838 is about 36606.3087185802. The cubic root of 1340021838 is about 1102.4797604277.

The spelling of 1340021838 in words is "one billion, three hundred forty million, twenty-one thousand, eight hundred thirty-eight".