13920690 has 64 divisors (see below), whose sum is σ = 38522880. Its totient is φ = 3153600.

The previous prime is 13920679. The next prime is 13920713. The reversal of 13920690 is 9602931.

13920690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×13920690² = 387571220152200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31491 + ... + 31929.

It is an arithmetic number, because the mean of its divisors is an integer number (601920).

Almost surely, 2^13920690 is an apocalyptic number.

13920690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13920690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19261440).

13920690 is an abundant number, since it is smaller than the sum of its proper divisors (24602190).

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

13920690 is a wasteful number, since it uses less digits than its factorization.

13920690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 13920690 is about 3731.0440897958. The cubic root of 13920690 is about 240.5582490958.

The spelling of 13920690 in words is "thirteen million, nine hundred twenty thousand, six hundred ninety".