1400909639 has 8 divisors (see below), whose sum is σ = 1421101920. Its totient is φ = 1380744576.

The previous prime is 1400909617. The next prime is 1400909647. The reversal of 1400909639 is 9369090041.

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-1400909639 is a prime.

It is a super-2 number, since 2×1400909639² = 3925095633286220642, 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 = 1400909596 and 1400909605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400909659) 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, 111494 + ... + 123420.

It is an arithmetic number, because the mean of its divisors is an integer number (177637740).

Almost surely, 2^1400909639 is an apocalyptic number.

1400909639 is a deficient number, since it is larger than the sum of its proper divisors (20192281).

1400909639 is a wasteful number, since it uses less digits than its factorization.

1400909639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13609.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 1400909639 is about 37428.7274563269. The cubic root of 1400909639 is about 1118.9311760759.

The spelling of 1400909639 in words is "one billion, four hundred million, nine hundred nine thousand, six hundred thirty-nine".