13523970 has 16 divisors (see below), whose sum is σ = 32457600. Its totient is φ = 3606384.

The previous prime is 13523969. The next prime is 13523989. The reversal of 13523970 is 7932531.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 450799 = 13523970 / (1 + 3 + 5 + 2 + 3 + 9 + 7 + 0).

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, 225370 + ... + 225429.

It is an arithmetic number, because the mean of its divisors is an integer number (2028600).

Almost surely, 2^13523970 is an apocalyptic number.

13523970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13523970 is an abundant number, since it is smaller than the sum of its proper divisors (18933630).

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

13523970 is a wasteful number, since it uses less digits than its factorization.

13523970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450809.

The product of its (nonzero) digits is 5670, while the sum is 30.

The square root of 13523970 is about 3677.4950713767. The cubic root of 13523970 is about 238.2510004080.

The spelling of 13523970 in words is "thirteen million, five hundred twenty-three thousand, nine hundred seventy".