1401624320 has 144 divisors (see below), whose sum is σ = 3461391360. Its totient is φ = 543608832.

The previous prime is 1401624311. The next prime is 1401624331. The reversal of 1401624320 is 234261041.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8392877 + ... + 8393043.

It is an arithmetic number, because the mean of its divisors is an integer number (24037440).

Almost surely, 2^1401624320 is an apocalyptic number.

1401624320 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 1401624320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1730695680).

1401624320 is an abundant number, since it is smaller than the sum of its proper divisors (2059767040).

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

1401624320 is an equidigital number, since it uses as much as digits as its factorization.

1401624320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350 (or 336 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1401624320 is about 37438.2734644641. The cubic root of 1401624320 is about 1119.1214198245.

Adding to 1401624320 its reverse (234261041), we get a palindrome (1635885361).

The spelling of 1401624320 in words is "one billion, four hundred one million, six hundred twenty-four thousand, three hundred twenty".