1405456838 has 4 divisors (see below), whose sum is σ = 2108185260. Its totient is φ = 702728418.

The previous prime is 1405456817. The next prime is 1405456859. The reversal of 1405456838 is 8386545041.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1405456817) and next prime (1405456859).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 351364208 + ... + 351364211.

It is an arithmetic number, because the mean of its divisors is an integer number (527046315).

Almost surely, 2^1405456838 is an apocalyptic number.

1405456838 is a deficient number, since it is larger than the sum of its proper divisors (702728422).

1405456838 is an equidigital number, since it uses as much as digits as its factorization.

1405456838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702728421.

The product of its (nonzero) digits is 460800, while the sum is 44.

The square root of 1405456838 is about 37489.4230150319. The cubic root of 1405456838 is about 1120.1405111765.

The spelling of 1405456838 in words is "one billion, four hundred five million, four hundred fifty-six thousand, eight hundred thirty-eight".