747684450 has 54 divisors (see below), whose sum is σ = 2010338499. Its totient is φ = 199227840.

The previous prime is 747684449. The next prime is 747684451. The reversal of 747684450 is 54486747.

It is an interprime number because it is at equal distance from previous prime (747684449) and next prime (747684451).

It can be written as a sum of positive squares in 5 ways, for example, as 515335401 + 232349049 = 22701^2 + 15243^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=19335.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 747684396 and 747684405.

It is not an unprimeable number, because it can be changed into a prime (747684451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 579406 + ... + 580694.

Almost surely, 2^747684450 is an apocalyptic number.

747684450 is an abundant number, since it is smaller than the sum of its proper divisors (1262654049).

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

747684450 is a wasteful number, since it uses less digits than its factorization.

747684450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2596 (or 1299 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 45.

The square root of 747684450 is about 27343.8192284838. The cubic root of 747684450 is about 907.6243028056.

The spelling of 747684450 in words is "seven hundred forty-seven million, six hundred eighty-four thousand, four hundred fifty".