13655990 has 16 divisors (see below), whose sum is σ = 24878448. Its totient is φ = 5396256.

The previous prime is 13655989. The next prime is 13656011. The reversal of 13655990 is 9955631.

It is a super-4 number, since 4×13655990⁴ (a number of 30 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7397 + ... + 9056.

It is an arithmetic number, because the mean of its divisors is an integer number (1554903).

Almost surely, 2^13655990 is an apocalyptic number.

13655990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13655990 is a deficient number, since it is larger than the sum of its proper divisors (11222458).

13655990 is a wasteful number, since it uses less digits than its factorization.

13655990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16543.

The product of its (nonzero) digits is 36450, while the sum is 38.

The square root of 13655990 is about 3695.4011960814. The cubic root of 13655990 is about 239.0237542259.

The spelling of 13655990 in words is "thirteen million, six hundred fifty-five thousand, nine hundred ninety".