1200431340 has 60 divisors (see below), whose sum is σ = 3765802656. Its totient is φ = 320114592.

The previous prime is 1200431339. The next prime is 1200431347. The reversal of 1200431340 is 431340021.

1200431340 is a `hidden beast` number, since 1 + 200 + 431 + 34 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1200431347) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 368884 + ... + 372123.

Almost surely, 2^1200431340 is an apocalyptic number.

1200431340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200431340 is an abundant number, since it is smaller than the sum of its proper divisors (2565371316).

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

1200431340 is a wasteful number, since it uses less digits than its factorization.

1200431340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741028 (or 741017 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1200431340 is about 34647.2414486348. The cubic root of 1200431340 is about 1062.7858781377.

Adding to 1200431340 its reverse (431340021), we get a palindrome (1631771361).

The spelling of 1200431340 in words is "one billion, two hundred million, four hundred thirty-one thousand, three hundred forty".