1898872390 has 16 divisors (see below), whose sum is σ = 3440912400. Its totient is φ = 754450720.

The previous prime is 1898872373. The next prime is 1898872399. The reversal of 1898872390 is 932788981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1898872399) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 635716 + ... + 638695.

It is an arithmetic number, because the mean of its divisors is an integer number (215057025).

Almost surely, 2^1898872390 is an apocalyptic number.

1898872390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1898872390 is a deficient number, since it is larger than the sum of its proper divisors (1542040010).

1898872390 is a wasteful number, since it uses less digits than its factorization.

1898872390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274567.

The product of its (nonzero) digits is 1741824, while the sum is 55.

The square root of 1898872390 is about 43576.0529419543. The cubic root of 1898872390 is about 1238.3172609202.

It can be divided in two parts, 18988 and 72390, that added together give a triangular number (91378 = T₄₂₇).

The spelling of 1898872390 in words is "one billion, eight hundred ninety-eight million, eight hundred seventy-two thousand, three hundred ninety".