1394839680 has 512 divisors, whose sum is σ = 5181926400. Its totient is φ = 316538880.

The previous prime is 1394839679. The next prime is 1394839703. The reversal of 1394839680 is 869384931.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 29677417 + ... + 29677463.

It is an arithmetic number, because the mean of its divisors is an integer number (10120950).

Almost surely, 2^1394839680 is an apocalyptic number.

1394839680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1394839680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2590963200).

1394839680 is an abundant number, since it is smaller than the sum of its proper divisors (3787086720).

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

1394839680 is a wasteful number, since it uses less digits than its factorization.

1394839680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 51.

The square root of 1394839680 is about 37347.5525302529. The cubic root of 1394839680 is about 1117.3127753648.

It can be divided in two parts, 13948 and 39680, that added together give a triangular number (53628 = T₃₂₇).

The spelling of 1394839680 in words is "one billion, three hundred ninety-four million, eight hundred thirty-nine thousand, six hundred eighty".