130640400 has 180 divisors, whose sum is σ = 494722800. Its totient is φ = 31660800.

The previous prime is 130640387. The next prime is 130640443. The reversal of 130640400 is 4046031.

It is a tau number, because it is divible by the number of its divisors (180).

It is a super-2 number, since 2×130640400² = 34133828224320000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 37951 + ... + 41249.

It is an arithmetic number, because the mean of its divisors is an integer number (2748460).

Almost surely, 2^130640400 is an apocalyptic number.

130640400 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 130640400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247361400).

130640400 is an abundant number, since it is smaller than the sum of its proper divisors (364082400).

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

130640400 is a wasteful number, since it uses less digits than its factorization.

130640400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3334 (or 3320 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 130640400 is about 11429.8031479112. The cubic root of 130640400 is about 507.4101695777.

Adding to 130640400 its reverse (4046031), we get a palindrome (134686431).

The spelling of 130640400 in words is "one hundred thirty million, six hundred forty thousand, four hundred".