1393566642 has 96 divisors (see below), whose sum is σ = 3440481408. Its totient is φ = 404414208.

The previous prime is 1393566637. The next prime is 1393566673. The reversal of 1393566642 is 2466653931.

It is a super-3 number, since 3×1393566642³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 391113 + ... + 394659.

It is an arithmetic number, because the mean of its divisors is an integer number (35838348).

Almost surely, 2^1393566642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1393566642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1720240704).

1393566642 is an abundant number, since it is smaller than the sum of its proper divisors (2046914766).

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

1393566642 is a wasteful number, since it uses less digits than its factorization.

1393566642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3664 (or 3661 counting only the distinct ones).

The product of its digits is 699840, while the sum is 45.

The square root of 1393566642 is about 37330.5055149271. The cubic root of 1393566642 is about 1116.9727567027.

The spelling of 1393566642 in words is "one billion, three hundred ninety-three million, five hundred sixty-six thousand, six hundred forty-two".