13420990 has 32 divisors (see below), whose sum is σ = 27908064. Its totient is φ = 4592640.

The previous prime is 13420987. The next prime is 13420999. The reversal of 13420990 is 9902431.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13420999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1719 + ... + 5458.

It is an arithmetic number, because the mean of its divisors is an integer number (872127).

Almost surely, 2^13420990 is an apocalyptic number.

13420990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13420990 is an abundant number, since it is smaller than the sum of its proper divisors (14487074).

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

13420990 is a wasteful number, since it uses less digits than its factorization.

13420990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7212.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 13420990 is about 3663.4669372058. The cubic root of 13420990 is about 237.6447280387.

The spelling of 13420990 in words is "thirteen million, four hundred twenty thousand, nine hundred ninety".