38963840 has 64 divisors (see below), whose sum is σ = 97234560. Its totient is φ = 14902272.

The previous prime is 38963831. The next prime is 38963879. The reversal of 38963840 is 4836983.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13397 + ... + 16043.

It is an arithmetic number, because the mean of its divisors is an integer number (1519290).

Almost surely, 2^38963840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38963840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48617280).

38963840 is an abundant number, since it is smaller than the sum of its proper divisors (58270720).

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

38963840 is a wasteful number, since it uses less digits than its factorization.

38963840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2689 (or 2677 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 38963840 is about 6242.1022099930. The cubic root of 38963840 is about 339.0163031697.

The spelling of 38963840 in words is "thirty-eight million, nine hundred sixty-three thousand, eight hundred forty".