1391204472 has 288 divisors, whose sum is σ = 4456328400. Its totient is φ = 360364032.

The previous prime is 1391204471. The next prime is 1391204489. The reversal of 1391204472 is 2744021931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1391204471) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 12311488 + ... + 12311600.

Almost surely, 2^1391204472 is an apocalyptic number.

1391204472 is a gapful number since it is divisible by the number (12) 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 1391204472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2228164200).

1391204472 is an abundant number, since it is smaller than the sum of its proper divisors (3065123928).

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

1391204472 is a wasteful number, since it uses less digits than its factorization.

1391204472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 1391204472 is about 37298.8534944440. The cubic root of 1391204472 is about 1116.3412902552.

The spelling of 1391204472 in words is "one billion, three hundred ninety-one million, two hundred four thousand, four hundred seventy-two".