1400639918 has 8 divisors (see below), whose sum is σ = 2104149960. Its totient is φ = 699256600.

The previous prime is 1400639899. The next prime is 1400639927. The reversal of 1400639918 is 8199360041.

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

It is a congruent number.

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, 530033 + ... + 532668.

It is an arithmetic number, because the mean of its divisors is an integer number (263018745).

Almost surely, 2^1400639918 is an apocalyptic number.

1400639918 is a deficient number, since it is larger than the sum of its proper divisors (703510042).

1400639918 is a wasteful number, since it uses less digits than its factorization.

1400639918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063362.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 1400639918 is about 37425.1241547707. The cubic root of 1400639918 is about 1118.8593611641.

Adding to 1400639918 its reverse (8199360041), we get a palindrome (9599999959).

The spelling of 1400639918 in words is "one billion, four hundred million, six hundred thirty-nine thousand, nine hundred eighteen".