1394252688 has 80 divisors (see below), whose sum is σ = 3821380416. Its totient is φ = 436531200.

The previous prime is 1394252677. The next prime is 1394252689. The reversal of 1394252688 is 8862524931.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (1394252689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 488995 + ... + 491837.

Almost surely, 2^1394252688 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 1394252688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1910690208).

1394252688 is an abundant number, since it is smaller than the sum of its proper divisors (2427127728).

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

1394252688 is a wasteful number, since it uses less digits than its factorization.

1394252688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3472 (or 3466 counting only the distinct ones).

The product of its digits is 829440, while the sum is 48.

The square root of 1394252688 is about 37339.6931963829. The cubic root of 1394252688 is about 1117.1560200299.

The spelling of 1394252688 in words is "one billion, three hundred ninety-four million, two hundred fifty-two thousand, six hundred eighty-eight".