1898378254 has 4 divisors (see below), whose sum is σ = 2847567384. Its totient is φ = 949189126.

The previous prime is 1898378249. The next prime is 1898378281. The reversal of 1898378254 is 4528738981.

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

It is a junction number, because it is equal to n+sod(n) for n = 1898378195 and 1898378204.

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, 474594562 + ... + 474594565.

It is an arithmetic number, because the mean of its divisors is an integer number (711891846).

Almost surely, 2^1898378254 is an apocalyptic number.

1898378254 is a deficient number, since it is larger than the sum of its proper divisors (949189130).

1898378254 is an equidigital number, since it uses as much as digits as its factorization.

1898378254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949189129.

The product of its digits is 3870720, while the sum is 55.

The square root of 1898378254 is about 43570.3827616880. The cubic root of 1898378254 is about 1238.2098374784.

The spelling of 1898378254 in words is "one billion, eight hundred ninety-eight million, three hundred seventy-eight thousand, two hundred fifty-four".