77238369 has 12 divisors (see below), whose sum is σ = 120148756. Its totient is φ = 47531232.

The previous prime is 77238367. The next prime is 77238373. The reversal of 77238369 is 96383277.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 35247969 + 41990400 = 5937^2 + 6480^2 .

It is not a de Polignac number, because 77238369 - 2¹ = 77238367 is a prime.

It is a super-2 number, since 2×77238369² = 11931531291560322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77238367) 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, 329962 + ... + 330195.

Almost surely, 2^77238369 is an apocalyptic number.

It is an amenable number.

77238369 is a deficient number, since it is larger than the sum of its proper divisors (42910387).

77238369 is a wasteful number, since it uses less digits than its factorization.

77238369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660176 (or 660173 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 77238369 is about 8788.5362262438. The cubic root of 77238369 is about 425.8706378353.

The spelling of 77238369 in words is "seventy-seven million, two hundred thirty-eight thousand, three hundred sixty-nine".