3398781 has 4 divisors (see below), whose sum is σ = 4531712. Its totient is φ = 2265852.

The previous prime is 3398761. The next prime is 3398851. The reversal of 3398781 is 1878933.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3398781 - 2¹³ = 3390589 is a prime.

It is a super-2 number, since 2×3398781² = 23103424571922, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3398741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 566461 + ... + 566466.

It is an arithmetic number, because the mean of its divisors is an integer number (1132928).

Almost surely, 2^3398781 is an apocalyptic number.

It is an amenable number.

3398781 is a deficient number, since it is larger than the sum of its proper divisors (1132931).

3398781 is a wasteful number, since it uses less digits than its factorization.

3398781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132930.

The product of its digits is 36288, while the sum is 39.

The square root of 3398781 is about 1843.5783140404. The cubic root of 3398781 is about 150.3514868478.

The spelling of 3398781 in words is "three million, three hundred ninety-eight thousand, seven hundred eighty-one".