39897444 has 24 divisors (see below), whose sum is σ = 93205728. Its totient is φ = 13283200.

The previous prime is 39897443. The next prime is 39897461. The reversal of 39897444 is 44479893.

It is a junction number, because it is equal to n+sod(n) for n = 39897393 and 39897402.

It is not an unprimeable number, because it can be changed into a prime (39897443) 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, 12844 + ... + 15644.

It is an arithmetic number, because the mean of its divisors is an integer number (3883572).

Almost surely, 2^39897444 is an apocalyptic number.

It is an amenable number.

39897444 is an abundant number, since it is smaller than the sum of its proper divisors (53308284).

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

39897444 is a wasteful number, since it uses less digits than its factorization.

39897444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3995 (or 3993 counting only the distinct ones).

The product of its digits is 870912, while the sum is 48.

The square root of 39897444 is about 6316.4423530972. The cubic root of 39897444 is about 341.7026586976.

The spelling of 39897444 in words is "thirty-nine million, eight hundred ninety-seven thousand, four hundred forty-four".