157784049 has 12 divisors (see below), whose sum is σ = 228045636. Its totient is φ = 105126912.

The previous prime is 157783993. The next prime is 157784051. The reversal of 157784049 is 940487751.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 74390625 + 83393424 = 8625^2 + 9132^2 .

It is not a de Polignac number, because 157784049 - 2⁷ = 157783921 is a prime.

It is a super-2 number, since 2×157784049² = 49791612237668802, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 157783995 and 157784013.

It is not an unprimeable number, because it can be changed into a prime (157784849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14869 + ... + 23165.

It is an arithmetic number, because the mean of its divisors is an integer number (19003803).

Almost surely, 2^157784049 is an apocalyptic number.

It is an amenable number.

157784049 is a deficient number, since it is larger than the sum of its proper divisors (70261587).

157784049 is a wasteful number, since it uses less digits than its factorization.

157784049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10416 (or 10413 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The square root of 157784049 is about 12561.2120832346. The cubic root of 157784049 is about 540.3656063203.

The spelling of 157784049 in words is "one hundred fifty-seven million, seven hundred eighty-four thousand, forty-nine".