1389923560 has 64 divisors (see below), whose sum is σ = 3164313600. Its totient is φ = 549432576.

The previous prime is 1389923539. The next prime is 1389923581. The reversal of 1389923560 is 653299831.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1389923539) and next prime (1389923581).

It is a self number, because there is not a number n which added to its sum of digits gives 1389923560.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2128194 + ... + 2128846.

It is an arithmetic number, because the mean of its divisors is an integer number (49442400).

Almost surely, 2^1389923560 is an apocalyptic number.

1389923560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1389923560 is an abundant number, since it is smaller than the sum of its proper divisors (1774390040).

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

1389923560 is a wasteful number, since it uses less digits than its factorization.

1389923560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210 (or 1206 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 1389923560 is about 37281.6786102772. The cubic root of 1389923560 is about 1115.9985718733.

The spelling of 1389923560 in words is "one billion, three hundred eighty-nine million, nine hundred twenty-three thousand, five hundred sixty".