77209338 has 16 divisors (see below), whose sum is σ = 158010336. Its totient is φ = 25137840.

The previous prime is 77209337. The next prime is 77209361. The reversal of 77209338 is 83390277.

It is a super-2 number, since 2×77209338² = 11922563748796488, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 77209296 and 77209305.

It is not an unprimeable number, because it can be changed into a prime (77209333) 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, 149373 + ... + 149888.

It is an arithmetic number, because the mean of its divisors is an integer number (9875646).

Almost surely, 2^77209338 is an apocalyptic number.

77209338 is an abundant number, since it is smaller than the sum of its proper divisors (80800998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77209338 is a wasteful number, since it uses less digits than its factorization.

77209338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299309.

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 77209338 is about 8786.8844307866. The cubic root of 77209338 is about 425.8172748934.

The spelling of 77209338 in words is "seventy-seven million, two hundred nine thousand, three hundred thirty-eight".