1838400454 has 32 divisors (see below), whose sum is σ = 3055431456. Its totient is φ = 822635520.

The previous prime is 1838400439. The next prime is 1838400467. The reversal of 1838400454 is 4540048381.

It is a super-2 number, since 2×1838400454² = 6759432458534812232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 418212 + ... + 422584.

It is an arithmetic number, because the mean of its divisors is an integer number (95482233).

Almost surely, 2^1838400454 is an apocalyptic number.

1838400454 is a deficient number, since it is larger than the sum of its proper divisors (1217031002).

1838400454 is a wasteful number, since it uses less digits than its factorization.

1838400454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4680.

The product of its (nonzero) digits is 61440, while the sum is 37.

The square root of 1838400454 is about 42876.5723210240. The cubic root of 1838400454 is about 1225.0299487888.

The spelling of 1838400454 in words is "one billion, eight hundred thirty-eight million, four hundred thousand, four hundred fifty-four".