16243690 has 32 divisors (see below), whose sum is σ = 30712320. Its totient is φ = 6177600.

The previous prime is 16243663. The next prime is 16243697. The reversal of 16243690 is 9634261.

It is a super-2 number, since 2×16243690² = 527714929632200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (16243697) 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, 18481 + ... + 19339.

It is an arithmetic number, because the mean of its divisors is an integer number (959760).

Almost surely, 2^16243690 is an apocalyptic number.

16243690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16243690 is a deficient number, since it is larger than the sum of its proper divisors (14468630).

16243690 is a wasteful number, since it uses less digits than its factorization.

16243690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 16243690 is about 4030.3461389811. The cubic root of 16243690 is about 253.2570619114.

The spelling of 16243690 in words is "sixteen million, two hundred forty-three thousand, six hundred ninety".