16041990 has 32 divisors (see below), whose sum is σ = 38787840. Its totient is φ = 4245984.

The previous prime is 16041989. The next prime is 16041997. The reversal of 16041990 is 9914061.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16041997) 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, 2247 + ... + 6093.

It is an arithmetic number, because the mean of its divisors is an integer number (1212120).

Almost surely, 2^16041990 is an apocalyptic number.

16041990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16041990 is an abundant number, since it is smaller than the sum of its proper divisors (22745850).

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

16041990 is a wasteful number, since it uses less digits than its factorization.

16041990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3996.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 16041990 is about 4005.2453108393. The cubic root of 16041990 is about 252.2044511131.

The spelling of 16041990 in words is "sixteen million, forty-one thousand, nine hundred ninety".