1384605720 has 48 divisors (see below), whose sum is σ = 4499969760. Its totient is φ = 369228096.

The previous prime is 1384605713. The next prime is 1384605721. The reversal of 1384605720 is 275064831.

1384605720 is a `hidden beast` number, since 1 + 3 + 84 + 6 + 0 + 572 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1384605721) 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, 1922704 + ... + 1923423.

It is an arithmetic number, because the mean of its divisors is an integer number (93749370).

Almost surely, 2^1384605720 is an apocalyptic number.

1384605720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1384605720 is an abundant number, since it is smaller than the sum of its proper divisors (3115364040).

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

1384605720 is a wasteful number, since it uses less digits than its factorization.

1384605720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3846144 (or 3846137 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 1384605720 is about 37210.2905121688. The cubic root of 1384605720 is about 1114.5734847060.

The spelling of 1384605720 in words is "one billion, three hundred eighty-four million, six hundred five thousand, seven hundred twenty".