1838400442 has 48 divisors (see below), whose sum is σ = 3061411200. Its totient is φ = 826255584.

The previous prime is 1838400439. The next prime is 1838400467. The reversal of 1838400442 is 2440048381.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1838400398 and 1838400407.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2473923 + ... + 2474665.

It is an arithmetic number, because the mean of its divisors is an integer number (63779400).

Almost surely, 2^1838400442 is an apocalyptic number.

1838400442 is a deficient number, since it is larger than the sum of its proper divisors (1223010758).

1838400442 is a wasteful number, since it uses less digits than its factorization.

1838400442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955 (or 936 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 34.

The square root of 1838400442 is about 42876.5721810874. The cubic root of 1838400442 is about 1225.0299461234.

The spelling of 1838400442 in words is "one billion, eight hundred thirty-eight million, four hundred thousand, four hundred forty-two".