1396142784 has 224 divisors, whose sum is σ = 4311091200. Its totient is φ = 442506240.

The previous prime is 1396142773. The next prime is 1396142821. The reversal of 1396142784 is 4872416931.

1396142784 is a `hidden beast` number, since 1 + 3 + 9 + 614 + 27 + 8 + 4 = 666.

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, 3588862 + ... + 3589250.

Almost surely, 2^1396142784 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 1396142784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2155545600).

1396142784 is an abundant number, since it is smaller than the sum of its proper divisors (2914948416).

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

1396142784 is a wasteful number, since it uses less digits than its factorization.

1396142784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508 (or 492 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 1396142784 is about 37364.9940987551. The cubic root of 1396142784 is about 1117.6606102204.

The spelling of 1396142784 in words is "one billion, three hundred ninety-six million, one hundred forty-two thousand, seven hundred eighty-four".