309698444 has 24 divisors (see below), whose sum is σ = 591704400. Its totient is φ = 140662080.

The previous prime is 309698413. The next prime is 309698447. The reversal of 309698444 is 444896903.

It is a happy number.

It is a super-2 number, since 2×309698444² = 191826252432042272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (309698447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87542 + ... + 91010.

It is an arithmetic number, because the mean of its divisors is an integer number (24654350).

Almost surely, 2^309698444 is an apocalyptic number.

It is an amenable number.

309698444 is a deficient number, since it is larger than the sum of its proper divisors (282005956).

309698444 is a wasteful number, since it uses less digits than its factorization.

309698444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5513 (or 5511 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 47.

The square root of 309698444 is about 17598.2511631128. The cubic root of 309698444 is about 676.5704223274.

The spelling of 309698444 in words is "three hundred nine million, six hundred ninety-eight thousand, four hundred forty-four".