1401988608 has 160 divisors (see below), whose sum is σ = 4263700320. Its totient is φ = 454533120.

The previous prime is 1401988603. The next prime is 1401988613. The reversal of 1401988608 is 8068891041.

It is an interprime number because it is at equal distance from previous prime (1401988603) and next prime (1401988613).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401988603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 510118 + ... + 512858.

It is an arithmetic number, because the mean of its divisors is an integer number (26648127).

Almost surely, 2^1401988608 is an apocalyptic number.

1401988608 is a gapful number since it is divisible by the number (18) 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 1401988608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2131850160).

1401988608 is an abundant number, since it is smaller than the sum of its proper divisors (2861711712).

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

1401988608 is an equidigital number, since it uses as much as digits as its factorization.

1401988608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2805 (or 2783 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The square root of 1401988608 is about 37443.1383300065. The cubic root of 1401988608 is about 1119.2183661992.

The spelling of 1401988608 in words is "one billion, four hundred one million, nine hundred eighty-eight thousand, six hundred eight".