1389692724 has 36 divisors (see below), whose sum is σ = 3772024704. Its totient is φ = 397054896.

The previous prime is 1389692723. The next prime is 1389692741. The reversal of 1389692724 is 4272969831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389692723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1181124 + ... + 1182299.

It is an arithmetic number, because the mean of its divisors is an integer number (104778464).

Almost surely, 2^1389692724 is an apocalyptic number.

1389692724 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1389692724 is an abundant number, since it is smaller than the sum of its proper divisors (2382331980).

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

1389692724 is a wasteful number, since it uses less digits than its factorization.

1389692724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2363444 (or 2363435 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 51.

The square root of 1389692724 is about 37278.5826447305. The cubic root of 1389692724 is about 1115.9367874423.

The spelling of 1389692724 in words is "one billion, three hundred eighty-nine million, six hundred ninety-two thousand, seven hundred twenty-four".