754653640 has 32 divisors (see below), whose sum is σ = 1828585080. Its totient is φ = 278641152.

The previous prime is 754653619. The next prime is 754653649. The reversal of 754653640 is 46356457.

It can be written as a sum of positive squares in 4 ways, for example, as 547466404 + 207187236 = 23398^2 + 14394^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 754653593 and 754653602.

It is not an unprimeable number, because it can be changed into a prime (754653649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 725109 + ... + 726148.

Almost surely, 2^754653640 is an apocalyptic number.

It is an amenable number.

754653640 is an abundant number, since it is smaller than the sum of its proper divisors (1073931440).

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

754653640 is a wasteful number, since it uses less digits than its factorization.

754653640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1451281 (or 1451277 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 40.

The square root of 754653640 is about 27470.9599395434. The cubic root of 754653640 is about 910.4355842469.

The spelling of 754653640 in words is "seven hundred fifty-four million, six hundred fifty-three thousand, six hundred forty".