1398739446 has 48 divisors (see below), whose sum is σ = 3266521440. Its totient is φ = 430012800.

The previous prime is 1398739429. The next prime is 1398739471. The reversal of 1398739446 is 6449378931.

It is a happy number.

1398739446 is a `hidden beast` number, since 139 + 87 + 394 + 46 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1398739392 and 1398739401.

It is a congruent number.

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, 419775 + ... + 423093.

It is an arithmetic number, because the mean of its divisors is an integer number (68052530).

Almost surely, 2^1398739446 is an apocalyptic number.

1398739446 is an abundant number, since it is smaller than the sum of its proper divisors (1867781994).

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

1398739446 is a wasteful number, since it uses less digits than its factorization.

1398739446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5141 (or 5138 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The square root of 1398739446 is about 37399.7252128943. The cubic root of 1398739446 is about 1118.3530870174.

The spelling of 1398739446 in words is "one billion, three hundred ninety-eight million, seven hundred thirty-nine thousand, four hundred forty-six".