1538814408 has 64 divisors (see below), whose sum is σ = 4059264000. Its totient is φ = 484771392.

The previous prime is 1538814391. The next prime is 1538814421. The reversal of 1538814408 is 8044188351.

1538814408 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 1538814408.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196341 + ... + 204027.

It is an arithmetic number, because the mean of its divisors is an integer number (63426000).

Almost surely, 2^1538814408 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 1538814408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2029632000).

1538814408 is an abundant number, since it is smaller than the sum of its proper divisors (2520449592).

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

1538814408 is a wasteful number, since it uses less digits than its factorization.

1538814408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8154 (or 8150 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 42.

The square root of 1538814408 is about 39227.7249913884. The cubic root of 1538814408 is about 1154.5039274444.

The spelling of 1538814408 in words is "one billion, five hundred thirty-eight million, eight hundred fourteen thousand, four hundred eight".