754064640 has 360 divisors, whose sum is σ = 3086603520. Its totient is φ = 172191744.

The previous prime is 754064621. The next prime is 754064651. The reversal of 754064640 is 46460457.

754064640 is a `hidden beast` number, since 7 + 5 + 4 + 0 + 6 + 4 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (360).

It is a super-2 number, since 2×754064640² = 1137226962596659200, which contains 22 as substring.

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 = 754064595 and 754064604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 725241 + ... + 726279.

Almost surely, 2^754064640 is an apocalyptic number.

754064640 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 754064640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1543301760).

754064640 is an abundant number, since it is smaller than the sum of its proper divisors (2332538880).

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

754064640 is a wasteful number, since it uses less digits than its factorization.

754064640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079 (or 1056 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 754064640 is about 27460.2374352444. The cubic root of 754064640 is about 910.1986604879.

The spelling of 754064640 in words is "seven hundred fifty-four million, sixty-four thousand, six hundred forty".