13640370 has 16 divisors (see below), whose sum is σ = 32736960. Its totient is φ = 3637424.

The previous prime is 13640351. The next prime is 13640371. The reversal of 13640370 is 7304631.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13640370.

It is not an unprimeable number, because it can be changed into a prime (13640371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227310 + ... + 227369.

It is an arithmetic number, because the mean of its divisors is an integer number (2046060).

Almost surely, 2^13640370 is an apocalyptic number.

13640370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13640370 is an abundant number, since it is smaller than the sum of its proper divisors (19096590).

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

13640370 is a wasteful number, since it uses less digits than its factorization.

13640370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454689.

The product of its (nonzero) digits is 1512, while the sum is 24.

The square root of 13640370 is about 3693.2871537426. The cubic root of 13640370 is about 238.9325860413.

The spelling of 13640370 in words is "thirteen million, six hundred forty thousand, three hundred seventy".