1301609400 has 384 divisors, whose sum is σ = 5133004800. Its totient is φ = 265420800.

The previous prime is 1301609381. The next prime is 1301609447. The reversal of 1301609400 is 49061031.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1692216 + ... + 1692984.

It is an arithmetic number, because the mean of its divisors is an integer number (13367200).

Almost surely, 2^1301609400 is an apocalyptic number.

1301609400 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 1301609400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2566502400).

1301609400 is an abundant number, since it is smaller than the sum of its proper divisors (3831395400).

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

1301609400 is a wasteful number, since it uses less digits than its factorization.

1301609400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839 (or 830 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 1301609400 is about 36077.8242137743. The cubic root of 1301609400 is about 1091.8430787945.

The spelling of 1301609400 in words is "one billion, three hundred one million, six hundred nine thousand, four hundred".