1406634641 has 8 divisors (see below), whose sum is σ = 1466110464. Its totient is φ = 1348040160.

The previous prime is 1406634631. The next prime is 1406634643. The reversal of 1406634641 is 1464366041.

It is a happy number.

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-1406634641 is a prime.

It is a super-2 number, since 2×1406634641² = 3957242026522397762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1406634643) 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, 217076 + ... + 223461.

It is an arithmetic number, because the mean of its divisors is an integer number (183263808).

Almost surely, 2^1406634641 is an apocalyptic number.

It is an amenable number.

1406634641 is a deficient number, since it is larger than the sum of its proper divisors (59475823).

1406634641 is a wasteful number, since it uses less digits than its factorization.

1406634641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440671.

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 1406634641 is about 37505.1281960214. The cubic root of 1406634641 is about 1120.4533244092.

The spelling of 1406634641 in words is "one billion, four hundred six million, six hundred thirty-four thousand, six hundred forty-one".