13373640 has 256 divisors, whose sum is σ = 53568000. Its totient is φ = 2903040.

The previous prime is 13373639. The next prime is 13373641. The reversal of 13373640 is 4637331.

It is a happy number.

13373640 is a `hidden beast` number, since 13 + 3 + 7 + 3 + 640 = 666.

It is an interprime number because it is at equal distance from previous prime (13373639) and next prime (13373641).

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

It is not an unprimeable number, because it can be changed into a prime (13373641) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 219210 + ... + 219270.

It is an arithmetic number, because the mean of its divisors is an integer number (209250).

Almost surely, 2^13373640 is an apocalyptic number.

13373640 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 13373640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26784000).

13373640 is an abundant number, since it is smaller than the sum of its proper divisors (40194360).

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

13373640 is a wasteful number, since it uses less digits than its factorization.

13373640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 27.

The square root of 13373640 is about 3656.9987694830. The cubic root of 13373640 is about 237.3649241148.

The spelling of 13373640 in words is "thirteen million, three hundred seventy-three thousand, six hundred forty".