102242440 has 16 divisors (see below), whose sum is σ = 230045580. Its totient is φ = 40896960.

The previous prime is 102242431. The next prime is 102242443. The reversal of 102242440 is 44242201.

It can be written as a sum of positive squares in 2 ways, for example, as 81830116 + 20412324 = 9046^2 + 4518^2 .

It is not an unprimeable number, because it can be changed into a prime (102242443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1277991 + ... + 1278070.

Almost surely, 2^102242440 is an apocalyptic number.

102242440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102242440 is an abundant number, since it is smaller than the sum of its proper divisors (127803140).

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

102242440 is a wasteful number, since it uses less digits than its factorization.

102242440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2556072 (or 2556068 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 102242440 is about 10111.5003832270. The cubic root of 102242440 is about 467.6027627339.

Adding to 102242440 its reverse (44242201), we get a palindrome (146484641).

The spelling of 102242440 in words is "one hundred two million, two hundred forty-two thousand, four hundred forty".