102440356 has 6 divisors (see below), whose sum is σ = 179270630. Its totient is φ = 51220176.

The previous prime is 102440339. The next prime is 102440357. The reversal of 102440356 is 653044201.

It can be written as a sum of positive squares in only one way, i.e., 70291456 + 32148900 = 8384^2 + 5670^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 102440356.

It is not an unprimeable number, because it can be changed into a prime (102440357) 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 as a sum of consecutive naturals, namely, 12805041 + ... + 12805048.

Almost surely, 2^102440356 is an apocalyptic number.

It is an amenable number.

102440356 is a deficient number, since it is larger than the sum of its proper divisors (76830274).

102440356 is a wasteful number, since it uses less digits than its factorization.

102440356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25610093 (or 25610091 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 102440356 is about 10121.2823298236. The cubic root of 102440356 is about 467.9042892399.

Adding to 102440356 its reverse (653044201), we get a palindrome (755484557).

The spelling of 102440356 in words is "one hundred two million, four hundred forty thousand, three hundred fifty-six".