749307285 has 12 divisors (see below), whose sum is σ = 1298799372. Its totient is φ = 399630528.

The previous prime is 749307277. The next prime is 749307329. The reversal of 749307285 is 582703947.

It can be written as a sum of positive squares in 2 ways, for example, as 468376164 + 280931121 = 21642^2 + 16761^2 .

It is not a de Polignac number, because 749307285 - 2³ = 749307277 is a prime.

It is a super-2 number, since 2×749307285² = 1122922814708142450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 16651273 = 749307285 / (7 + 4 + 9 + 3 + 0 + 7 + 2 + 8 + 5).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 749307285.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8325592 + ... + 8325681.

It is an arithmetic number, because the mean of its divisors is an integer number (108233281).

Almost surely, 2^749307285 is an apocalyptic number.

It is an amenable number.

749307285 is a deficient number, since it is larger than the sum of its proper divisors (549492087).

749307285 is a wasteful number, since it uses less digits than its factorization.

749307285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16651284 (or 16651281 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The square root of 749307285 is about 27373.4777658960. The cubic root of 749307285 is about 908.2804887661.

It can be divided in two parts, 74930 and 7285, that added together give a triangular number (82215 = T₄₀₅).

The spelling of 749307285 in words is "seven hundred forty-nine million, three hundred seven thousand, two hundred eighty-five".