408994749 has 12 divisors (see below), whose sum is σ = 609827712. Its totient is φ = 263867400.

The previous prime is 408994739. The next prime is 408994757. The reversal of 408994749 is 947499804.

It is a happy number.

It is not a de Polignac number, because 408994749 - 2²⁰ = 407946173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 408994695 and 408994704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408994739) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 732687 + ... + 733244.

It is an arithmetic number, because the mean of its divisors is an integer number (50818976).

Almost surely, 2^408994749 is an apocalyptic number.

It is an amenable number.

408994749 is a deficient number, since it is larger than the sum of its proper divisors (200832963).

408994749 is a wasteful number, since it uses less digits than its factorization.

408994749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465968 (or 1465965 counting only the distinct ones).

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

The square root of 408994749 is about 20223.6185931203. The cubic root of 408994749 is about 742.2882353616.

The spelling of 408994749 in words is "four hundred eight million, nine hundred ninety-four thousand, seven hundred forty-nine".