1401689738 has 8 divisors (see below), whose sum is σ = 2170358400. Its totient is φ = 678236940.

The previous prime is 1401689719. The next prime is 1401689749. The reversal of 1401689738 is 8379861041.

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

It is a super-2 number, since 2×1401689738² = 3929468243229017288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1401689692 and 1401689701.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11303888 + ... + 11304011.

It is an arithmetic number, because the mean of its divisors is an integer number (271294800).

Almost surely, 2^1401689738 is an apocalyptic number.

1401689738 is a deficient number, since it is larger than the sum of its proper divisors (768668662).

1401689738 is a wasteful number, since it uses less digits than its factorization.

1401689738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22607932.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 1401689738 is about 37439.1471323800. The cubic root of 1401689738 is about 1119.1388304685.

The spelling of 1401689738 in words is "one billion, four hundred one million, six hundred eighty-nine thousand, seven hundred thirty-eight".