13401940 has 12 divisors (see below), whose sum is σ = 28144116. Its totient is φ = 5360768.

The previous prime is 13401937. The next prime is 13401989. The reversal of 13401940 is 4910431.

It can be written as a sum of positive squares in 2 ways, for example, as 7851204 + 5550736 = 2802^2 + 2356^2 .

It is a super-2 number, since 2×13401940² = 359223991527200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 335029 + ... + 335068.

It is an arithmetic number, because the mean of its divisors is an integer number (2345343).

Almost surely, 2^13401940 is an apocalyptic number.

13401940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13401940 is an abundant number, since it is smaller than the sum of its proper divisors (14742176).

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

13401940 is a wasteful number, since it uses less digits than its factorization.

13401940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670106 (or 670104 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 13401940 is about 3660.8660177614. The cubic root of 13401940 is about 237.5322356983.

It can be divided in two parts, 13401 and 940, that added together give a palindrome (14341).

The spelling of 13401940 in words is "thirteen million, four hundred one thousand, nine hundred forty".