16386240 has 168 divisors, whose sum is σ = 56893968. Its totient is φ = 3993600.

The previous prime is 16386239. The next prime is 16386269. The reversal of 16386240 is 4268361.

It is a super-2 number, since 2×16386240² = 537017722675200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

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

It is a junction number, because it is equal to n+sod(n) for n = 16386198 and 16386207.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 162190 + ... + 162290.

Almost surely, 2^16386240 is an apocalyptic number.

16386240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16386240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28446984).

16386240 is an abundant number, since it is smaller than the sum of its proper divisors (40507728).

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

16386240 is a wasteful number, since it uses less digits than its factorization.

16386240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 16386240 is about 4047.9920948539. The cubic root of 16386240 is about 253.9957425868.

The spelling of 16386240 in words is "sixteen million, three hundred eighty-six thousand, two hundred forty".