102403002440 has 16 divisors (see below), whose sum is σ = 230406755580. Its totient is φ = 40961200960.

The previous prime is 102403002409. The next prime is 102403002463. The reversal of 102403002440 is 44200304201.

It can be written as a sum of positive squares in 2 ways, for example, as 95479764004 + 6923238436 = 308998^2 + 83206^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1280037491 + ... + 1280037570.

Almost surely, 2^102403002440 is an apocalyptic number.

102403002440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102403002440 is an abundant number, since it is smaller than the sum of its proper divisors (128003753140).

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

102403002440 is a wasteful number, since it uses less digits than its factorization.

102403002440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2560075072 (or 2560075068 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 102403002440 its reverse (44200304201), we get a palindrome (146603306641).

The spelling of 102403002440 in words is "one hundred two billion, four hundred three million, two thousand, four hundred forty".