1384898781 has 16 divisors (see below), whose sum is σ = 2117533824. Its totient is φ = 788666304.

The previous prime is 1384898759. The next prime is 1384898791. The reversal of 1384898781 is 1878984831.

1384898781 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1384898781 - 2⁶ = 1384898717 is a prime.

It is a super-2 number, since 2×1384898781² = 3835889267230571922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1384898791) 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, 106386 + ... + 118691.

It is an arithmetic number, because the mean of its divisors is an integer number (132345864).

Almost surely, 2^1384898781 is an apocalyptic number.

It is an amenable number.

1384898781 is a deficient number, since it is larger than the sum of its proper divisors (732635043).

1384898781 is a wasteful number, since it uses less digits than its factorization.

1384898781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225380.

The product of its digits is 3096576, while the sum is 57.

The square root of 1384898781 is about 37214.2282064266. The cubic root of 1384898781 is about 1114.6521147865.

The spelling of 1384898781 in words is "one billion, three hundred eighty-four million, eight hundred ninety-eight thousand, seven hundred eighty-one".