1400000000 has 180 divisors, whose sum is σ = 3996091704. Its totient is φ = 480000000.

The previous prime is 1399999987. The next prime is 1400000023. The reversal of 1400000000 is 41.

It is a Harshad number since it is a multiple of its sum of digits (5).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1400000000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 199999997 + ... + 200000003.

Almost surely, 2^1400000000 is an apocalyptic number.

1400000000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1400000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1998045852).

1400000000 is an abundant number, since it is smaller than the sum of its proper divisors (2596091704).

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

1400000000 is an frugal number, since it uses more digits than its factorization.

1400000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65 (or 14 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 5.

The square root of 1400000000 is about 37416.5738677394. The cubic root of 1400000000 is about 1118.6889420814.

Adding to 1400000000 its reverse (41), we get a palindrome (1400000041).

The spelling of 1400000000 in words is "one billion, four hundred million", and thus it is an aban number.