77222430 has 32 divisors (see below), whose sum is σ = 205927200. Its totient is φ = 20592576.

The previous prime is 77222429. The next prime is 77222437. The reversal of 77222430 is 3422277.

77222430 is a `hidden beast` number, since 7 + 7 + 222 + 430 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 77222394 and 77222403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77222437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142735 + ... + 143274.

It is an arithmetic number, because the mean of its divisors is an integer number (6435225).

Almost surely, 2^77222430 is an apocalyptic number.

77222430 is an abundant number, since it is smaller than the sum of its proper divisors (128704770).

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

77222430 is a wasteful number, since it uses less digits than its factorization.

77222430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286025 (or 286019 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 27.

The square root of 77222430 is about 8787.6293731586. The cubic root of 77222430 is about 425.8413414326.

The spelling of 77222430 in words is "seventy-seven million, two hundred twenty-two thousand, four hundred thirty".