1400440231 has 8 divisors (see below), whose sum is σ = 1428719984. Its totient is φ = 1372377600.

The previous prime is 1400440219. The next prime is 1400440271. The reversal of 1400440231 is 1320440041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1400440231 is a prime.

It is a super-2 number, since 2×1400440231² = 3922465681206666722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1400440199 and 1400440208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400440271) 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, 41220 + ... + 67081.

It is an arithmetic number, because the mean of its divisors is an integer number (178589998).

Almost surely, 2^1400440231 is an apocalyptic number.

1400440231 is a deficient number, since it is larger than the sum of its proper divisors (28279753).

1400440231 is a wasteful number, since it uses less digits than its factorization.

1400440231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108561.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1400440231 is about 37422.4562395362. The cubic root of 1400440231 is about 1118.8061873053.

Adding to 1400440231 its reverse (1320440041), we get a palindrome (2720880272).

The spelling of 1400440231 in words is "one billion, four hundred million, four hundred forty thousand, two hundred thirty-one".