389011440 has 40 divisors (see below), whose sum is σ = 1205936208. Its totient is φ = 103736320.

The previous prime is 389011429. The next prime is 389011471. The reversal of 389011440 is 44110983.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 389011398 and 389011407.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 810201 + ... + 810680.

Almost surely, 2^389011440 is an apocalyptic number.

389011440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

389011440 is an abundant number, since it is smaller than the sum of its proper divisors (816924768).

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

389011440 is a wasteful number, since it uses less digits than its factorization.

389011440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620897 (or 1620891 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 389011440 is about 19723.3729366962. The cubic root of 389011440 is about 729.9965221577.

The spelling of 389011440 in words is "three hundred eighty-nine million, eleven thousand, four hundred forty".