751229640 has 384 divisors, whose sum is σ = 2957310720. Its totient is φ = 167961600.

The previous prime is 751229639. The next prime is 751229671. The reversal of 751229640 is 46922157.

751229640 is a `hidden beast` number, since 7 + 5 + 1 + 2 + 2 + 9 + 640 = 666.

751229640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 751229595 and 751229604.

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, 4150350 + ... + 4150530.

It is an arithmetic number, because the mean of its divisors is an integer number (7701330).

Almost surely, 2^751229640 is an apocalyptic number.

751229640 is a gapful number since it is divisible by the number (70) 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 751229640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1478655360).

751229640 is an abundant number, since it is smaller than the sum of its proper divisors (2206081080).

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

751229640 is a wasteful number, since it uses less digits than its factorization.

751229640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275 (or 259 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 751229640 is about 27408.5687331535. The cubic root of 751229640 is about 909.0565595627.

The spelling of 751229640 in words is "seven hundred fifty-one million, two hundred twenty-nine thousand, six hundred forty".