13858740 has 144 divisors (see below), whose sum is σ = 50948352. Its totient is φ = 2976768.

The previous prime is 13858739. The next prime is 13858763. The reversal of 13858740 is 4785831.

13858740 is a `hidden beast` number, since 1 + 38 + 587 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 13858695 and 13858704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21097 + ... + 21743.

It is an arithmetic number, because the mean of its divisors is an integer number (353808).

Almost surely, 2^13858740 is an apocalyptic number.

13858740 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 13858740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25474176).

13858740 is an abundant number, since it is smaller than the sum of its proper divisors (37089612).

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

13858740 is a wasteful number, since it uses less digits than its factorization.

13858740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686 (or 681 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 13858740 is about 3722.7328671287. The cubic root of 13858740 is about 240.2008734941.

The spelling of 13858740 in words is "thirteen million, eight hundred fifty-eight thousand, seven hundred forty".