1001400500 has 48 divisors (see below), whose sum is σ = 2195850384. Its totient is φ = 398950400.

The previous prime is 1001400493. The next prime is 1001400503. The reversal of 1001400500 is 50041001.

It can be written as a sum of positive squares in 8 ways, for example, as 1449616 + 999950884 = 1204^2 + 31622^2 .

It is a super-2 number, since 2×1001400500² = 2005605922800500000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001400503) 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, 124604 + ... + 132396.

It is an arithmetic number, because the mean of its divisors is an integer number (45746883).

Almost surely, 2^1001400500 is an apocalyptic number.

1001400500 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 1001400500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1097925192).

1001400500 is an abundant number, since it is smaller than the sum of its proper divisors (1194449884).

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

1001400500 is a wasteful number, since it uses less digits than its factorization.

1001400500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8069 (or 8057 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 1001400500 is about 31644.9127033083. The cubic root of 1001400500 is about 1000.4666155694.

Adding to 1001400500 its reverse (50041001), we get a palindrome (1051441501).

The spelling of 1001400500 in words is "one billion, one million, four hundred thousand, five hundred".