749032857 has 12 divisors (see below), whose sum is σ = 1082306004. Its totient is φ = 499184640.

The previous prime is 749032853. The next prime is 749032861. The reversal of 749032857 is 758230947.

749032857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (749032853) and next prime (749032861).

It can be written as a sum of positive squares in 2 ways, for example, as 540981081 + 208051776 = 23259^2 + 14424^2 .

It is not a de Polignac number, because 749032857 - 2² = 749032853 is a prime.

It is a super-2 number, since 2×749032857² = 1122100441731164898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (749032853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17257 + ... + 42377.

It is an arithmetic number, because the mean of its divisors is an integer number (90192167).

Almost surely, 2^749032857 is an apocalyptic number.

It is an amenable number.

749032857 is a deficient number, since it is larger than the sum of its proper divisors (333273147).

749032857 is a wasteful number, since it uses less digits than its factorization.

749032857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28440 (or 28437 counting only the distinct ones).

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

The square root of 749032857 is about 27368.4646445503. The cubic root of 749032857 is about 908.1695916576.

It can be divided in two parts, 7490328 and 57, that added together give a triangular number (7490385 = T₃₈₇₀).

The spelling of 749032857 in words is "seven hundred forty-nine million, thirty-two thousand, eight hundred fifty-seven".