1401723648 has 216 divisors, whose sum is σ = 4439543472. Its totient is φ = 422682624.

The previous prime is 1401723607. The next prime is 1401723679. The reversal of 1401723648 is 8463271041.

1401723648 is a `hidden beast` number, since 1 + 4 + 0 + 1 + 7 + 2 + 3 + 648 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1587015 + ... + 1587897.

It is an arithmetic number, because the mean of its divisors is an integer number (20553442).

Almost surely, 2^1401723648 is an apocalyptic number.

1401723648 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 1401723648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2219771736).

1401723648 is an abundant number, since it is smaller than the sum of its proper divisors (3037819824).

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

1401723648 is a wasteful number, since it uses less digits than its factorization.

1401723648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971 (or 954 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 1401723648 is about 37439.5999978632. The cubic root of 1401723648 is about 1119.1478552169.

Adding to 1401723648 its reverse (8463271041), we get a palindrome (9864994689).

The spelling of 1401723648 in words is "one billion, four hundred one million, seven hundred twenty-three thousand, six hundred forty-eight".