1384427840 has 56 divisors (see below), whose sum is σ = 3358911240. Its totient is φ = 543315968.

The previous prime is 1384427833. The next prime is 1384427851. The reversal of 1384427840 is 487244831.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 417466624 + 966961216 = 20432^2 + 31096^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23855 + ... + 57774.

Almost surely, 2^1384427840 is an apocalyptic number.

1384427840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1384427840 is an abundant number, since it is smaller than the sum of its proper divisors (1974483400).

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

1384427840 is an equidigital number, since it uses as much as digits as its factorization.

1384427840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81699 (or 81689 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 41.

The square root of 1384427840 is about 37207.9002363745. The cubic root of 1384427840 is about 1114.5257529897.

The spelling of 1384427840 in words is "one billion, three hundred eighty-four million, four hundred twenty-seven thousand, eight hundred forty".