77532238 has 16 divisors (see below), whose sum is σ = 134091360. Its totient is φ = 32933376.

The previous prime is 77532233. The next prime is 77532263. The reversal of 77532238 is 83223577.

It is a super-2 number, since 2×77532238² = 12022495858577288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 77532197 and 77532206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77532233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22923 + ... + 26086.

It is an arithmetic number, because the mean of its divisors is an integer number (8380710).

Almost surely, 2^77532238 is an apocalyptic number.

77532238 is a deficient number, since it is larger than the sum of its proper divisors (56559122).

77532238 is a wasteful number, since it uses less digits than its factorization.

77532238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49131.

The product of its digits is 70560, while the sum is 37.

The square root of 77532238 is about 8805.2392358186. The cubic root of 77532238 is about 426.4100579663.

The spelling of 77532238 in words is "seventy-seven million, five hundred thirty-two thousand, two hundred thirty-eight".