77212274 has 8 divisors (see below), whose sum is σ = 117547248. Its totient is φ = 38029860.

The previous prime is 77212271. The next prime is 77212277. The reversal of 77212274 is 47221277.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (77212271) and next prime (77212277).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 77212274.

It is not an unprimeable number, because it can be changed into a prime (77212271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287972 + ... + 288239.

It is an arithmetic number, because the mean of its divisors is an integer number (14693406).

Almost surely, 2^77212274 is an apocalyptic number.

77212274 is a deficient number, since it is larger than the sum of its proper divisors (40334974).

77212274 is a wasteful number, since it uses less digits than its factorization.

77212274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576280.

The product of its digits is 10976, while the sum is 32.

The square root of 77212274 is about 8787.0514963781. The cubic root of 77212274 is about 425.8226722702.

The spelling of 77212274 in words is "seventy-seven million, two hundred twelve thousand, two hundred seventy-four".