3398491728 has 50 divisors (see below), whose sum is σ = 9836224794. Its totient is φ = 1132830144.

The previous prime is 3398491711. The next prime is 3398491729. The reversal of 3398491728 is 8271948933.

It can be written as a sum of positive squares in only one way, i.e., 3002163264 + 396328464 = 54792^2 + 19908^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3398491729) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1309851 + ... + 1312442.

Almost surely, 2^3398491728 is an apocalyptic number.

It is an amenable number.

3398491728 is an abundant number, since it is smaller than the sum of its proper divisors (6437733066).

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

3398491728 is a wasteful number, since it uses less digits than its factorization.

3398491728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2622313 (or 2622298 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 3398491728 is about 58296.5841880980. The cubic root of 3398491728 is about 1503.4722122928.

The spelling of 3398491728 in words is "three billion, three hundred ninety-eight million, four hundred ninety-one thousand, seven hundred twenty-eight".