1400344040 has 16 divisors (see below), whose sum is σ = 3150774180. Its totient is φ = 560137600.

The previous prime is 1400344039. The next prime is 1400344051. The reversal of 1400344040 is 404430041.

It can be written as a sum of positive squares in 2 ways, for example, as 1359101956 + 41242084 = 36866^2 + 6422^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17504261 + ... + 17504340.

Almost surely, 2^1400344040 is an apocalyptic number.

1400344040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1400344040 is an abundant number, since it is smaller than the sum of its proper divisors (1750430140).

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

1400344040 is a wasteful number, since it uses less digits than its factorization.

1400344040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35008612 (or 35008608 counting only the distinct ones).

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

The square root of 1400344040 is about 37421.1710132112. The cubic root of 1400344040 is about 1118.7805711817.

Adding to 1400344040 its reverse (404430041), we get a palindrome (1804774081).

The spelling of 1400344040 in words is "one billion, four hundred million, three hundred forty-four thousand, forty".