815029749 has 8 divisors (see below), whose sum is σ = 1207451520. Its totient is φ = 543353148.

The previous prime is 815029727. The next prime is 815029751. The reversal of 815029749 is 947920518.

It is not a de Polignac number, because 815029749 - 2⁸ = 815029493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815029799) 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, 15093117 + ... + 15093170.

It is an arithmetic number, because the mean of its divisors is an integer number (150931440).

Almost surely, 2^815029749 is an apocalyptic number.

It is an amenable number.

815029749 is a deficient number, since it is larger than the sum of its proper divisors (392421771).

815029749 is a wasteful number, since it uses less digits than its factorization.

815029749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30186296 (or 30186290 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 815029749 is about 28548.7258734957. The cubic root of 815029749 is about 934.0952285494.

The spelling of 815029749 in words is "eight hundred fifteen million, twenty-nine thousand, seven hundred forty-nine".