1398041442 has 54 divisors (see below), whose sum is σ = 3526436043. Its totient is φ = 399123144.

The previous prime is 1398041417. The next prime is 1398041507. The reversal of 1398041442 is 2441408931.

It is a happy number.

1398041442 is a `hidden beast` number, since 139 + 80 + 4 + 1 + 442 = 666.

It can be written as a sum of positive squares in only one way, i.e., 699020721 + 699020721 = 26439^2 + 26439^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=26439.

It is a junction number, because it is equal to n+sod(n) for n = 1398041397 and 1398041406.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1109809 + ... + 1111067.

Almost surely, 2^1398041442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1398041442

1398041442 is an abundant number, since it is smaller than the sum of its proper divisors (2128394601).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1398041442 is an equidigital number, since it uses as much as digits as its factorization.

1398041442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2540 (or 1271 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 1398041442 is about 37390.3923755823. The cubic root of 1398041442 is about 1118.1670278685.

It can be divided in two parts, 139804 and 1442, that added together give a triangular number (141246 = T₅₃₁).

The spelling of 1398041442 in words is "one billion, three hundred ninety-eight million, forty-one thousand, four hundred forty-two".