13921470 has 96 divisors (see below), whose sum is σ = 39862368. Its totient is φ = 3483648.

The previous prime is 13921451. The next prime is 13921477. The reversal of 13921470 is 7412931.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13921477) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 41142 + ... + 41478.

It is an arithmetic number, because the mean of its divisors is an integer number (415233).

Almost surely, 2^13921470 is an apocalyptic number.

13921470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13921470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19931184).

13921470 is an abundant number, since it is smaller than the sum of its proper divisors (25940898).

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

13921470 is a wasteful number, since it uses less digits than its factorization.

13921470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376 (or 364 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 13921470 is about 3731.1486167131. The cubic root of 13921470 is about 240.5627419748.

It can be divided in two parts, 139 and 21470, that added together give a square (21609 = 147²).

The spelling of 13921470 in words is "thirteen million, nine hundred twenty-one thousand, four hundred seventy".