1401406668 has 18 divisors (see below), whose sum is σ = 3542444724. Its totient is φ = 467135544.

The previous prime is 1401406663. The next prime is 1401406673. The reversal of 1401406668 is 8666041041.

It is an interprime number because it is at equal distance from previous prime (1401406663) and next prime (1401406673).

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×1401406668² = 3927881298229724448, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 38927963 = 1401406668 / (1 + 4 + 0 + 1 + 4 + 0 + 6 + 6 + 6 + 8).

It is not an unprimeable number, because it can be changed into a prime (1401406663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19463946 + ... + 19464017.

Almost surely, 2^1401406668 is an apocalyptic number.

1401406668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1401406668 is an abundant number, since it is smaller than the sum of its proper divisors (2141038056).

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

1401406668 is a wasteful number, since it uses less digits than its factorization.

1401406668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38927973 (or 38927968 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 1401406668 is about 37435.3665402117. The cubic root of 1401406668 is about 1119.0634890317.

The spelling of 1401406668 in words is "one billion, four hundred one million, four hundred six thousand, six hundred sixty-eight".