1302040240 has 40 divisors (see below), whose sum is σ = 3054054528. Its totient is φ = 516203520.

The previous prime is 1302040219. The next prime is 1302040247. The reversal of 1302040240 is 420402031.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (1302040247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62976 + ... + 81055.

Almost surely, 2^1302040240 is an apocalyptic number.

1302040240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1302040240 is an abundant number, since it is smaller than the sum of its proper divisors (1752014288).

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

1302040240 is a wasteful number, since it uses less digits than its factorization.

1302040240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144157 (or 144151 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 1302040240 is about 36083.7947006686. The cubic root of 1302040240 is about 1091.9635342293.

Adding to 1302040240 its reverse (420402031), we get a palindrome (1722442271).

The spelling of 1302040240 in words is "one billion, three hundred two million, forty thousand, two hundred forty".