13451640 has 32 divisors (see below), whose sum is σ = 40355280. Its totient is φ = 3587072.

The previous prime is 13451629. The next prime is 13451653. The reversal of 13451640 is 4615431.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 13451640.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55929 + ... + 56168.

Almost surely, 2^13451640 is an apocalyptic number.

13451640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13451640 is an abundant number, since it is smaller than the sum of its proper divisors (26903640).

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

13451640 is a wasteful number, since it uses less digits than its factorization.

13451640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112111 (or 112107 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 13451640 is about 3667.6477475352. The cubic root of 13451640 is about 237.8254964512.

The spelling of 13451640 in words is "thirteen million, four hundred fifty-one thousand, six hundred forty".