102640418 has 8 divisors (see below), whose sum is σ = 154212012. Its totient is φ = 51236416.

The previous prime is 102640397. The next prime is 102640423. The reversal of 102640418 is 814046201.

It can be written as a sum of positive squares in 2 ways, for example, as 94614529 + 8025889 = 9727^2 + 2833^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40355 + ... + 42822.

Almost surely, 2^102640418 is an apocalyptic number.

102640418 is a deficient number, since it is larger than the sum of its proper divisors (51571594).

102640418 is an equidigital number, since it uses as much as digits as its factorization.

102640418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83796.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 102640418 is about 10131.1607429751. The cubic root of 102640418 is about 468.2086907434.

Adding to 102640418 its reverse (814046201), we get a palindrome (916686619).

The spelling of 102640418 in words is "one hundred two million, six hundred forty thousand, four hundred eighteen".