750721400 has 96 divisors (see below), whose sum is σ = 2050650000. Its totient is φ = 251980800.

The previous prime is 750721373. The next prime is 750721441. The reversal of 750721400 is 4127057.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 750721400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15476 + ... + 41724.

Almost surely, 2^750721400 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 750721400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1025325000).

750721400 is an abundant number, since it is smaller than the sum of its proper divisors (1299928600).

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

750721400 is a wasteful number, since it uses less digits than its factorization.

750721400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26289 (or 26280 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 750721400 is about 27399.2956113839. The cubic root of 750721400 is about 908.8515076885.

Adding to 750721400 its reverse (4127057), we get a palindrome (754848457).

The spelling of 750721400 in words is "seven hundred fifty million, seven hundred twenty-one thousand, four hundred".