102649618 has 32 divisors (see below), whose sum is σ = 168975360. Its totient is φ = 46630080.

The previous prime is 102649597. The next prime is 102649619. The reversal of 102649618 is 816946201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (102649619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65755 + ... + 67297.

It is an arithmetic number, because the mean of its divisors is an integer number (5280480).

Almost surely, 2^102649618 is an apocalyptic number.

102649618 is a deficient number, since it is larger than the sum of its proper divisors (66325742).

102649618 is a wasteful number, since it uses less digits than its factorization.

102649618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 102649618 is about 10131.6147775170. The cubic root of 102649618 is about 468.2226793564. Note that the first 3 decimals are identical.

The spelling of 102649618 in words is "one hundred two million, six hundred forty-nine thousand, six hundred eighteen".