1408380636 has 96 divisors (see below), whose sum is σ = 3603728128. Its totient is φ = 425502720.

The previous prime is 1408380629. The next prime is 1408380653. The reversal of 1408380636 is 6360838041.

1408380636 = T₄₈₄₈ + T₄₈₄₉ + ... + T₄₉₆₄.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 1408380594 and 1408380603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2466231 + ... + 2466801.

Almost surely, 2^1408380636 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 1408380636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1801864064).

1408380636 is an abundant number, since it is smaller than the sum of its proper divisors (2195347492).

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

1408380636 is a wasteful number, since it uses less digits than its factorization.

1408380636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851 (or 849 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 1408380636 is about 37528.3977275876. The cubic root of 1408380636 is about 1120.9167228821.

The spelling of 1408380636 in words is "one billion, four hundred eight million, three hundred eighty thousand, six hundred thirty-six".